Study the following activity and answer the question. 1.Take two aluminium channels of different lengths. 2.Place the lower ends of the channels on the floor and hold their upper ends at the same height. 3.Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
Answers
Explanation:
The Law of conservation of energy is demonstrated using this activity. At the top of the channels, the total mechanical energy of the balls is in the form of potential energy. Now, as they roll down, they come into motion. This motion shows that the balls now possess kinetic energy. too. As the law of conservation of energy states that energy cannot be created nor destroyed, this means this kinetic energy came into existence because of decreases in potential energy of the ball ( decrease in potential energy is due to decrease in height). Also, when the ball reaches the bottom, the total mechanical energy of the balls in the form of kinetic energy. This shows that all the potential energy of the balls got converted to kinetic energy at the bottom.
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