A 75-kg long-jumper takes 3.1 s to reach a prejump speed of 10 m/s. what is his power output?

Answers

Answer 1
For this first we need to calculate acceleration of the jumper i.e, a = v/t = 10m/s / 3.1 s now we need to calculate the force of the jumper i.e, f = m * a = 75 * 10/3.1 now we need to calculate the power output for that the formula is power output = force * velocity = 75 * (10 / 3.1) * 3.1 = 75 *10 = 750
Answer 2

The equation for Power is:

Power = Work / time

 

According to work energy theorem, the work done is equal to the change in kinetic energy, therefore:

P = [KE(f) – KE(i)] / t

 

Since the jumper starts from rest, so KE(i) is zero, hence:

P = KE(f) / t

 

Where KE kinetic energy is 0.5 mv^2, therefore:

P = 0.5 mv^2 / t

P = 0.5 (75 kg) (10 m/s)^2 / 3.1 s

P = 1209.68 W


Related Questions

How do people and animals learn responses through classical conditioning?

Answers

People and animals learn response through classical conditioning by association. And by association, I mean, linking the corrent situation/concept with another that already experienced in the past. This generally happens through points of similarity. It also has to be repeated to register in the human or animal mind. An example, when a mom tend her hand to her child to cross the street, the child will take the hand and prepare him/herself to cross the street, there is no need for a verbal clarification. By only linking the hand gestures and the place, the child knows that he/she is going to cross the street therefore he/she must crab his/her mother’s hand.

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Answers

This is a true statement. Considering that women were considered the "fairer sex" in the Victorian Age, it was understandable that they were seen to be "angelic" in nature. When a woman sullied her and her family's name by engaging in sex outside of the marital relationship, it was seen as falling into the temptation of Lucifer, the fallen angel from Heaven.

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b. ​significance, immediacy, consistency, and reinforcement
c. ​attraction, distinction, repetition, and meaning
d. ​attention, retention, reproduction, and motivation

Answers

The correct option from given options is "d".
Bandura identified four necessary cognitive processes in the modeling of others' behavior. they are, in order of ​attention, retention, reproduction, and motivation.

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d. programmatic

Answers

The no child left behind act is an example of a(n) preemption.
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The answer is Moratorium
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Answers

Psychologists use the term psychosis to refer to a loss of contact with reality.

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Answers

The BEST evidence to support the conclusion that the Yazoo Land Fraud was one of the most influential factors in the establishment of Georgia's borders is that as a result of the Yazoo Land Fraud, the western boundary of Georgia was moved from the Mississippi River to the Chattahoochee River. In the settlement that ended the controversy, Georgia ceded the present-day territory of Alabama and Mississippi to the federal government.

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Answers

Given the checks and balances implemented in the US government, any time a given branch attempts to override the constitutional rights of individuals, it is checked by another branch of the government, such as the judiciary or executive in this given scenario.

What is the basic difference between Folsom’s and Josephson’s views of these businessmen?

Answers

The difference between Folsom’s and Josephson’s views in terms of the businessmen is that Folsom has the belief of businessmen are characterized as genius people because of their tactics of having to gain a a high percentage of market share while Josephson believe that they are wrong, morally, because they only do their role because of the profit that they may gain.

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Answers

When a group gives you a t-shirt for becoming a member it is an example of a incentive called a Selective incentive. This type of incentive is a materialistic way to reward participants or consumers, which can have an impact on economic benefits or opportunities.

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Answers

The answer is social factors. The social factors are the external or internal factors that might affect the properties, uses or process that the drug could do in which they could either be a form of physical or social environment.

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Answers

Final answer:

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Explanation:

A machine's mechanical advantage is the ratio of the output force to the input force. Even though two machines may appear identical, their actual mechanical advantage can be different due to factors such as friction and efficiency.

For example, let's consider two pulley systems. Both systems may have the same number of pulleys and ropes, making them visually identical. However, if one system has more friction in the pulleys or ropes, it will have a lower actual mechanical advantage compared to the system with less friction.

Therefore, it is important to consider factors like friction and efficiency when comparing the actual mechanical advantage of two seemingly identical machines.

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Answers

alphanumeric filing system

Answer:alphanumeric

Explanation:

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Answers

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Answers

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Answers

In most cases that is true. It really depends on the reason behind why they dropped out.

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Complete Question:

Research shows that when people drop out of sports, they are unlikely to ever play sports again.

A) False B) True

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Answers

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Answers

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d. working hard and doing a job right brings personal satisfaction?

Answers

Animals can offer people welcome friendship

PLEASE HELP ASAP!!!!
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Methods of communication during play
Rules of the physical activity or sport
Equipment
Playing area

Answers

Final answer:

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Explanation:

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Answers

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Answers

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Answers

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Answers

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Answers

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Answers

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Answers

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Answers

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