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DerKrebs [107]
3 years ago
12

A sprinter generates a constant force of 52 N as he runs 100 m. How much work did he do?

Physics
1 answer:
LUCKY_DIMON [66]3 years ago
3 0
You just multiply these two numbers. It's 5200J, or 5.2kJ
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Consider dropping a ball from rest. This ball moves from astate of high gravitational potential energy to one of lowgravitationa
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From the negative to the positive cable.

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3 years ago
A solid sphere of weight 42.0 N rolls up an incline at an angle of 36.0°. At the bottom of the incline the center of mass of the
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Answer:

Part a)

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Part b)

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Part c)

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Explanation:

Part a)

As we know that rotational kinetic energy of the sphere is given as

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so we will have

KE = \frac{1}{5} mv^2 + \frac{1}{2}mv^2

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Part b)

By mechanical energy conservation law we know that

Work done against gravity = initial kinetic energy of the sphere

So we will have

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Part c)

by equation of energy conservation we know that

\frac{7}{10}mv^2 = mgL sin\theta

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v = d/t

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