GROWTH DEVELOPMENT CHILD
FORMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It never changes.
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It increases as the ball approaches its highest point.
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It decreases as the ball approaches its highest point.
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None of the above
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Detailed explanation-1: -The gravity continuously acts on the ball which leads to maximum potential energy. Thus the kinetic energy decreases and the potential energy increases.
Detailed explanation-2: -As it rises during its free-fall phase it slows down, loses kinetic energy, and gains gravitational potential energy, PE. As it starts down, still in free fall, the stored gravitational potential energy is converted back into kinetic energy as the object falls.
Detailed explanation-3: -Answer and Explanation: As the ball moves up higher, therefore the potential energy increases with the height. Hence from the energy conservation, the kinetic energy of the ball must decrease.
Detailed explanation-4: -Since the gravitational potential energy of an object is directly proportional to its height above the zero position, a doubling of the height will result in a doubling of the gravitational potential energy. A tripling of the height will result in a tripling of the gravitational potential energy.
Detailed explanation-5: -The ball’s gravitational potential energy increases after the ball is thrown until it reaches some maximum value and then decreases until it reaches its initial value.