ACTIVITY 3 Take a ping-pong ball. Release it from a height on a hard, smooth floor. You will observe that the ball after striking the floor bounces several times. Try to answer the following questions : (a) What is the potential energy and kinetic energy when you release the ball ? (b) Why does the ball bounce back after striking the floor ? (c) From where does the ball get the kinetic energy for motion after striking the floor ? (d) What happens to the energy of the ball when the ball stops bouncing ?
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In mathematics, the additive inverse of a number a is the number that, when added to a, yields zero. This number is also known as the opposite (number),[1] sign change,[2] and negation.[3] For a real number, it reverses its sign: the additive inverse (opposite number) of a positive number is negative, and the additive inverse of a negative number is positive. Zero is the additive inverse of itself.
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