The baseball player's acceleration, considering the coefficient of kinetic friction and his mass, is roughly -4.5 m/s². The negative sign indicates a deceleration due to friction.
Explanation:This is a problem involving Physics, specifically the concept of friction and acceleration. Here, we have a baseball player, with a mass of 55 kg, sliding into third base. The coefficient of kinetic friction between the player and the ground is stated to be 0.46. We'll use these values to calculate the player's acceleration.
The equation representing the force due to friction (Ff) is μmg, where μ is the coefficient of friction, m is mass and g is gravity (9.8 m/s²). Here, we insert the given values and find Ff to be approximately 247.34 N. Since Ff = ma (force is mass times acceleration), we can find the acceleration by rearranging to a = Ff/m. Inserting our values, we find the acceleration to be approximately -4.5 m/s².
The negative sign denotes that this is a deceleration force, as expected since the friction slows down the player.
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How does temperature affect water potential?
Temperature affect water potential. Water will diffuse down gradients of water potential, just as heat will flow down gradients of temperature and rocks will roll down gradients of gravitational potential.
What is gravitational potential?Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s².
The potential energy of water per unit volume in comparison to pure water under reference conditions is known as water potential. The tendency of water to migrate from one place to another due to osmosis, gravity, mechanical pressure, and matrix effects like capillary action is measured by water potential.
Temperature affect water potential. Water will diffuse down gradients of water potential, just as heat will flow down gradients of temperature and rocks will roll down gradients of gravitational potential.
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Kerosene was commonly used in lamps because it burns easily.
Answer:
This is a chemical property
Explanation:
On EDG
If a mack truck and a minicooper have a head-on collision, which vehicle will experience the greater force of impact? the greater impulse? the greater change in momentum? the greater deceleration?
The Mack truck has the higher force of impact, Mini cooper has the greater impulse, greater change in momentum occurs in Mini cooper, and the Mack truck has greater deceleration.
A characteristic of a moving body that it possesses due to its mass and motion and is equal to the sum of its mass and speed. Momentum is a vector quantity, which means it has magnitude with direction.
Due to its size and higher center of gravity, the Mack truck would impact with a larger force. Since a tiny cooper is lighter and smaller than a Mack truck, it would have a higher impulse. Due to its lesser weight and the fact that the Mack truck's impact would exert more force on it, the mini cooper would also experience a bigger change in momentum.
Due to its greater weight and longer slow down time, the Mack truck would experience a greater deceleration.
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In the chemical formula 2NO2 how many atoms ot oxygen are there
A pear hangs in a tree at a height of 1.8 m. The pear has a mass of 0.2 kg. The pear falls out of the tree and lands on the ground.
1. How much kinetic energy does the pear have when it reaches the ground?
2. How fast is the pear moving when it hits the ground?
Final answer:
The pear has a kinetic energy of 3.528 J just before it hits the ground, and it is traveling at a velocity of about 5.94 m/s at that moment.
Explanation:
To answer the two questions, we can use the principles of energy conservation and kinematics. When the pear falls, its gravitational potential energy is converted into kinetic energy.
1. Kinetic Energy of the Pear When it Reaches the Ground:: The gravitational potential energy (PE) of the pear at the height of 1.8 m is given by PE = mgh, where m is the mass, g is the acceleration due to gravity (9.8 m/s2), and h is the height. For the pear with a mass of 0.2 kg, the potential energy is PE = 0.2 kg * 9.8 m/s2 * 1.8 m = 3.528 J. Assuming there is no energy loss, this potential energy is entirely converted to kinetic energy (KE) just before the pear hits the ground.
2. Velocity of the Pear When it Hits the Ground:: The formula for kinetic energy is KE = ½mv2, where m is the mass and v is the velocity. We can rearrange this to solve for v, giving us v = √(2KE/m). Substituting the values we have, the velocity is v = √(2*3.528 J / 0.2 kg) = √(35.28 m2/s2) = 5.94 m/s (approximately). Therefore, just before impact, the pear is moving at a velocity of about 5.94 m/s.
If the president vetoes a bill, it can still become law If congress overrides the presidents veto with ___ majority
The correct answer would be "two-thirds"
The mass of a cube of iron is 250. g. iron has a density of 7.87 g/cm3. what is the mass of a cube of lead that has the same dimensions?
Final answer:
To find the mass of a lead cube with the same dimensions as an iron cube weighing 250 g, calculate the volume of the iron cube and multiply it by the density of lead, resulting in a mass of 359.01 g for the lead cube.
Explanation:
The mass of the iron cube is given as 250 g with a density of 7.87 g/cm³. To find the mass of a lead cube with the same dimensions, we first need to calculate its volume, then multiply it by lead's density to determine its mass. Using the provided density of lead (11.3 g/cm3), the calculation is as follows:
Volume of the iron cube = Mass / Density = 250 g / 7.87 g/cm³ = 31.77 cm³ (rounded to two decimal places).
Since both cubes have the same volume, the volume of the lead cube is also 31.77 cm³.
Mass of the lead cube = Volume x Density of lead = 31.77 cm³ x 11.3 g/cm³ = 359.01 g (rounded to two decimal places).
The ____________ zone extends to a maximum depth of 200 meters below the surface of the water.
calculate the kinetic energy of a car with a mass of 500kg traveling at a velocity of 10m/s^2 north. A) 2,500j B) 25,000j C) 50,000j D) 100j
The kinetic energy of a 500 kg car traveling at 10 m/s is calculated using the formula KE = 0.5 × m × v², resulting in 25,000 J, which corresponds to option B.
Explanation:To calculate the kinetic energy (KE) of a car, we can use the formula KE = 0.5 × m × v², where 'm' is the mass of the car and 'v' is its velocity. In this case, the car has a mass (m) of 500 kg and a velocity (v) of 10 m/s (note that the unit m/s² is typically used for acceleration, but here it's clear that velocity is intended).
Substituting the given values into the equation, we get KE = 0.5 × 500 kg × (10 m/s)² = 0.5 × 500 × 100 = 25000 J. Therefore, the kinetic energy of the car is 25,000 joules (J), which corresponds to option B).
An athlete jumping vertically on a trampoline leaves the surface with a velocity of 8.5 m/s upward. what maximum height does she reach?
What does the atomic mass tell you about an element?
The atomic mass of an element provides crucial information about the element, including its identity, its reactions with other elements and its behavior. It is determined by the total number of protons and neutrons. It can give you an idea about the size and weight of an atom.
Explanation:The atomic mass of an element is determined by the total number of protons and neutrons in an atom's nucleus. It provides crucial information about the element, including its identity, how it reacts with other elements and its behavior. For example, hydrogen has an atomic mass of 1 because it has one proton and no neutrons. On the other hand, helium has an atomic mass of 4, because it has two protons and two neutrons. Therefore, the atomic mass can give you an idea of the size and weight of an atom.
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A __________ change involves a change in one or more physical properties, but no change in the fundamental components that make up the substance
Convert 4 radians to degrees A. 242.6° B. 9.6° C. 229.2° D. 6.8°
what conditions in the nucleus are likely to result in an atom undergoing radioactive decay
You throw a ball straight up into the air at a speed of 15 m/s. You want to know how high above your hand the ball will be at exactly 2.5 sec after you released it.
A man drops a stone into a water well on his farm. He hears the sound of the splash 4.26s later. How deep is the well? The acceleration due to gravity is 9.8m/s^2 and the speed of sound in air is 313m/s. Answer in units of m
First let us calculate the time required for the stone to drop, say t1.
We use the formula:
h = vi t1 + 0.5 g t1^2
where h is height, vi is initial velocity = 0
h = 4.9 t1^2
Then the time required for the sound to go up, say t2:
h = 313 t2 – 4.9 t2^2
The two heights are equal so equate:
4.9 t1^2 = 313 t2 – 4.9 t2^2
We know that:
t1 + t2 = 4.26
so,
t1 = t2 – 4.26
Therefore:
4.9 (t2 – 4.26)^2 + 4.9 t2^2 – 313 t2 = 0
4.9 (t2^2 – 8.52 t2 + 18.1476) + 4.9 t2^2 – 313 t2 = 0
4.9 t2^2 – 41.748 t2 + 88.92324 + 4.9 t2^2 – 313 t2 = 0
9.8 t2^2 – 354.748 t2 = -88.92324
t2^2 – 36.2 t2 = -9.0738
Completing the square:
(t2 – 18.1)^2 = -9.0738 + 327.61
t2 – 18.1 = ± 17.85
t2 = 0.25s, 35.95
t2 cannot be greater than 4.26 s, therefore correct one is:
t2 = 0.25 s
Therefore height of the well is:
h = 313 t2 – 4.9 t2^2
h = 313 * 0.25 – 4.9 * 0.25^2
h = 77.94 m = 78m
Final answer:
The depth of the well is approximately 91.164 m neglecting the time for sound to travel up the well, and approximately 364.656 m taking into account the time for sound to travel up.
Explanation:
To calculate the depth of the well, we can use the equation: height = (1/2) * g * t2, where g is the acceleration due to gravity and t is the time it takes for the sound to travel back. Since the sound takes 4.26s to return, the formula becomes: height = (1/2) * 9.8 * (4.26)2. Solving this equation gives us the depth of the well as approximately 91.164 m.
Taking into account the time for sound to travel up the well, we need to consider the time it takes for the sound to travel down and then up again. The total time for the sound to travel down and back up is twice the time for the sound to travel down. So, the formula becomes: height = (1/2) * 9.8 * (2 * 4.26)2. Solving this equation gives us the depth of the well as approximately 364.656 m.
A car starts from rest and accelerates for 5.2 s with an acceleration of 2.8 m/s 2 . How far does it travel? Answer in units of m.
Find the weight of the same object on a planet where the gravitational attraction has been reduced to 1/10 of the earth’s pull.
Final answer:
To find the weight of an object on another planet with 1/10th of Earth's gravity, multiply the mass by the reduced gravitational force (0.98 m/s²) giving a weight of 0.98 N for a 1.0-kg object.
Explanation:
The weight of an object on another planet where gravitational attraction is reduced to 1/10 of Earth's can be calculated by adjusting the gravitational force. On Earth, the acceleration due to gravity, g, is 9.80 m/s², and the weight w of a 1.0-kg object is thus 9.8 N calculated by w = m * g. If the gravitational pull is 1/10th that of Earth's, the acceleration due to gravity on this new planet would be 0.98 m/s². Therefore, the weight of a 1.0-kg object on this planet would be:
w = m * g
= (1.0 kg) * (0.98 m/s²)
= 0.98 N.
So, an object that weighs 9.8 N on Earth would weigh just 0.98 N on a planet where gravity is 1/10 as strong.
A particle traveling through space is being accelerated by a 100 n force. all of a sudden, the particle encounters a second force of 100 n in the opposite direction of the first force. with both forces now acting on the particle, what happens?
Draw a distance over time graph of a dog that is tied to a 4 foot rope and travels in 1 complete circle
The graph representing a dog's displacement tied to a rope moving in a circle would be a sinusoidal wave, which fluctuates between a minimum and a maximum distance based on the dog's position in the circle. This pattern repeats each time the dog completes a full circle. The graph assumes a constant speed of the dog.
Explanation:The distance over time graph of a dog tied to a 4-foot rope traveling in a complete circle would essentially be a sinusoidal wave that repeats its pattern in the time it takes the dog to complete one circle. The reason for this wave-like pattern is that the dog's distance from a given point (like the post the rope is tied to) increases then decreases in a regular pattern as it moves in a circle.
Consider the initiation point to be when the dog is closest to the post. As the dog moves in its circle, the distance increases achieving maximum when it is farthest from the point. Then, as it continues to move, the distance decreases until it comes back to the starting point. This creates a cycle which repeats for each complete circle the dog travels, creating a sinusoidal pattern.
It's important to note that this expected graph assumes a constant speed of the dog. If the dog alters its pace then the shape of the graph would also vary correspondingly.
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A boulder that is resting on the top of a cliff slips over the edge and accelerates towards the ground. As the rock falls, the amount of kinetic energy A) increases. B) decreases. C) stays the same. D) increases then decreases.
The rock had potential energy as it rested on the edge of the cliff, and it had kinetic energy as it descended toward the earth, kinetic energy is increasing and setting it in motion.
What is kinetic energy and potential energy?Potential energy is a type of stored energy that depends on how various system elements interact with one another. A spring's potential energy increases when it is squeezed or stretched, for instance. A steel ball has higher potential energy if it is lifted above the ground as opposed to falling to the ground.
Kinetic energy is the energy that an object has as a result of motion. To accelerate an object, a force must be supplied to it. To apply a force, we must exert effort. Energy is transmitted to the object once the work is accomplished, at which point it moves at a new, constant speed.
Boulder when accelerates towards the ground then the kinetic energy will increase as it potential energy is decreasing and velocity is increasing.
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Protecting his nest, a 600-g peregrine falcon rams a marauding 1.5-kg raven in midair. the falcon is moving at 20.0 m/s , and the raven at 9.00 m/s at the moment of impact. the falcon strikes the raven at right angles to the raven's direction of flight and rebounds straight back with a speed of 5.00 m/s . by what angle does the impact change the raven's direction of motion?
In the vertical direction
there is no change of momentum.
Momentum in vertical = 1.5 * 9 = 13.5
Speed in vertical = 9 m/s
Momentum of Raven in x + momentum of falcon = initial momentum in x
=> Mx + 600*5 = 600*20
=> Mx = 600*15
=> Vx = 6000
Vy = 9
=> tanθ = 0.6 kg/9 = 0.066667
=> θ = 48.0128 degrees
The angle of raven changes to [tex]\boxed{48.01^\circ}[/tex] from initial direction after impact.
Further Explanation:
A collision is a phenomenon where, two or more object exerts forces on each other or colloid each other in comparatively short time.
An elastic collision is a collision where, after collision the net kinetic energy of the body remains constant. The kinetic energy and momentum is always conserved in the elastic collision.
An inelastic collision is a collision where, after collision the net kinetic energy of the body does not remain constant. The momentum is always conserved but the net kinetic energy does not conserve in an inelastic collision.
Given:
The mass of the is [tex]600\text{ g}[/tex].
Mass of the raven is [tex]1.5\text{ kg}[/tex].
Velocity of the falcon is [tex]20.0\text{ m/s}[/tex].
Velocity of the raven is [tex]9.00\text{ m/s}[/tex].
Concept:
Here the two birds undergo an elastic collision.
During impact the falcon strikes the raven at right angle and after impact the falcon bounce back as shown in the Figure 1.
Before impact the falcon moving towards positive y-axis direction and the raven is flying towards positive x-axis direction and after impact the falcon flying toward the negative y-axis direction.
Apply conservation of linear momentum.
[tex]\fbox{\begin\\{m_1}{\vec v_1} + {m_2}{\vec v_2}={m_1}{\vec v_1}^\prime + {m_2}{\vec v_2}^\prime\end{minispace}}[/tex]
Here, [tex]{m_1}[/tex] is the mass of the falcon; [tex]{v_1}[/tex] is the velocity of falcon, [tex]{m_2}[/tex] is the mass of the raven, [tex]{v_2}}[/tex] is the velocity of raven, [tex]{v_1}^\prime[/tex] is the velocity of falcon after collision and [tex]{v_2}^\prime[/tex] is the velocity of raven after collision.
Substitute for [tex]600\text{ g}[/tex] for [tex]{m_1}[/tex], [tex]20.0\text{ m/s}[/tex] for [tex]{v_1}[/tex], [tex]1.5\text{ kg}[/tex] for[tex]{m_2}[/tex], [tex]9.00\text{ m/s}[/tex] for [tex]{v_2}[/tex] and [tex]5.00\text{ m/s}[/tex] for [tex]{v_1}^\prime[/tex] in the above equation.
[tex]\left( {600{\text{ g}}\left( {\frac{{1{\text{ kg}}}}{{1000{\text{ g}}}}} \right)} \right)\left( {20.0{\text{ m/s }}\hat j} \right) + \left( {1.5{\text{ kg}}} \right)\left( {9.00{\text{ m/s }}\hat i} \right) = \left( {600{\text{ g}}\left( {\frac{{1{\text{ kg}}}}{{1000{\text{ g}}}}} \right)} \right)\left( {5.00{\text{ m/s}}\left( { - {\text{ }}\hat j} \right)} \right) + \left( {1.5{\text{ kg}}} \right){v_2}^\prime[/tex]
Simplify further.
[tex]{v_2}^\prime=9{\text{ m/s }}\hat i + 10{\text{ m/s }}\hat j[/tex]
The magnitude and the angle of raven after impact is given by:
[tex]\begin{aligned}{v_2}^\prime&=\sqrt {{{10}^2} + {9^2}} {\text{ m/s}}\angle{\tan ^{ - 1}}\left({\frac{{10}}{9}} \right)\\ &=\sqrt {181} {\text{ m/s}}\angle 48.01^\circ\\&=13.45{\text{ m/s}}\angle 48.01^\circ\\ \end{aligned}[/tex]
Therefore, the angle of raven changes to [tex]\boxed{48.01^\circ}[/tex] from initial direction after impact.
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Answer Details:
Grade: High school
Subject: Physics
Chapter: Kinematics
Keywords:
Protecting, his, nest, 600 g, peregrine, falcon, rams, marauding, 1.5 kg, raven, moving, 20.0 m/s, 9.00 m/s, moment, impact, strikes, right angle, direction, rebounds, straight, back, 5.00 m/s, angle, 48.01 deg, 13.45 m/s.
Haley's swim team hosted a home meet and needed volunteers. How did she reveal to her coach that she is not a team player?
Offered to be a timer for other race events
Stayed after the meet to clean up
Left the meet after her events were over
Encouraged other teammates after their races
C: Left Meet after her events were over
Theodore Maiman demonstrated the first working laser in 1960. At that time, scientists didn't really know what they were going to use the lasers for, but since then, there have been many new products developed that rely on laser technology.
In which of the following products are lasers used?
I.
CD players
II.
barcode scanners
III.
hair removal
IV.
medical surgery
Answer:
i, ii, iii and iv
Explanation:
Lasers are optical devices used to produce beam of light by the stimulated emission of radiation. As a matter of fact, Laser is the short form for "Light amplification by stimulated emission of radiation". Lasers can be used in various applications such as;
i. laser printers
ii. fiber optic and free-space optical communication
iii. medical surgery and
iv. treatments of skin
v. barcode scanners
vi. hair removal from face, leg, arm and other areas
vii. optical disk drives e.g in CD players
What kind of rock/mineral is wall board made out of?
William tell shoots an apple from his son's head. the speed of the 130-g arrow just before it strikes the apple is 24.8 m/s, and at the time of impact it is traveling horizontally.
If you notice that two waves combine and a part of the resulting wave has less light intensity than either of the individual waves, you're observing A. destructive interference. B. polarization. C. constructive interference. D. diffraction.
If you notice that two waves combine and a part of the resulting wave has less light intensity than either of the individual waves, you're observing destructive interference.
Why is the slope of position vs time squared 1/2a?
What motivates the squire in lines 85- 90?
URGENT DUE IN HALF AN HOUR:
You are in the middle of a large field. You walk in a straight line for 100m, then turn left and walk 100m more in start line before stopping. When you stop, you are 100m from the starting point.By how many degrees did you turn?
A) 90
B) 120
C) 30
D) 180
E) This is impossible.You cannot walk 200m and be the only 100m away from where you started.