GROWTH DEVELOPMENT CHILD
FORMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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at its highest point.
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at the moment it is released.
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as it begins to fall back to the ground.
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None of the above
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Detailed explanation-1: -As a ball is thrown up in the air, it has the lowest potential energy and highest kinetic energy when it starts since its height is minimum and velocity is maximum at that point. As the ball goes higher in the air, its velocity keeps on decreasing and becomes zero at the highest point in path.
Detailed explanation-2: -At the lowest point kinetic energy is zero / maximum while potential energy is zero / maximum. Mass affects / does not affect the amount of energy.
Detailed explanation-3: -Kinetic energy is greatest immediately after you stop doing work to get the ball rolling. Maximum gravitational potential energy could occur at either the top of the first hill, or at the ball’s highest point on the second hill, depending on circumstances.
Detailed explanation-4: -Thus the kinetic energy of a system is lowest to center of momentum reference frames, i.e., frames of reference in which the center of mass is stationary (either the center of mass frame or any other center of momentum frame).