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inna [77]
2 years ago
12

A pole-vaulter converts the kinetic energy of running to elastic potential energy in the pole, which is then converted to gravit

ational potential energy. If a pole-vaulter's center of gravity is 1.3 m above the ground while he sprints at 10.3 m/s, what is the maximum height of his center of gravity during the vault? For an extended object, the gravitational potential energy is U = mgh, where h is the height of the center of gravity
Physics
1 answer:
ZanzabumX [31]2 years ago
6 0

Explanation:

bf means of cost of the day of the day of the day Happy Birthday to you and your family and friends and family members of a na please replay video call rate of your life is not a good night and good night and friends and you are right sir and friends for the day of the day of the day of my friends with you and your family and friends and family is fine for the day of the day of the year and and your family is a great friend of the day and you can see it and I have a good time to talk with you and your friends for the delay of your family is my friend of my friend of my friend and daughter of your mother boad and daughter and I have told you I

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Answer: 0.6m

Explanation:

Given that:

force = 4.5 N

Work done = 2.7J

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Since work is done when force is applied on an object over a distance, apply the formula:

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2.7J = 4.5N x distance

Distance = (2.7J / 4.5N)

Distance = 0.6 m

Thus, the book was moved 0.6 metres far

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A ball is thrown straight up with enough speed so that it is in the air for several seconds. Assume the positive direction is up
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Explanation:

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The minus sign means that the acceleration due to gravity is always downward, so if we assume that the positive direction is upwards it must be negative.

At the highest point, vf= 0.

b) Prior to solve this point, we need to know which is the time when the ball reaches to its highest point.

As we know vf=0, we can solve (1) for t, as follows:

th = v₀/g

Now, for a time that is 0.7 s before this time, applying the acceleration definition and solving for v again, we have:

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v= v₀ -g((v₀/g)-0.7 s) = v₀ - v₀ + g*0.7 s

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