6. What is the kinetic energy of the ball as it is half way through the fall? (: Consider a 2-kg bowling ball sits on top of a bu

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6. What is the kinetic energy of the ball as it is half way through the fall?

(: Consider a 2-kg bowling ball sits on top of a building that is 40 meters tall. It falls to the ground. Think about the amounts of potential and kinetic energy the bowling ball has:
• as it sits on top of a building that is 40 meters tall.
• as it is half way through a fall off a building that is 40 meters tall and travelling 19.8 meters per second.
• as it is just about to hit the ground from a fall off a building that is 40 meters tall and travelling 28 meters per second

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Farah 3 years 2021-08-06T00:48:22+00:00 1 Answers 33 views 0

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  1. Dau
    0
    2021-08-06T00:50:12+00:00
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    Answer:

    Explanation:

    It is given that halfway through the fall, the speed of the ball is

    v’ = 19.8 m/s

    The kinetic energy of the ball is given by

    where

    m = 2 kg is the mass of the ball

    v’ = 19.8 m/s is its speed

    Substituting, we find the kinetic energy when the ball is halfway through the fall:

    KE=1/2(2)(19.8)^2392J

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