Study the following activity and answer the questions.
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.
Questions
1. At the moment of releasing the balls, which energy do the balls have?
2. As the balls roll down which energy is converted into which other form of energy?
3. Why do the balls cover the same distance on rolling down?
4. What is the form of the eventual total energy of the balls?
5. Which law related to energy does the above activity demonstrate? Explain.
Answers
Answer:
1 ➝ At the moment of releasing the balls they pases potential energy.
2 ➝ The potential energy of the balls convert to kinetic energy as they roll down.
3 ➝ The total energy of the balls convert to kinetic energy as they roll down.
4 ➝ The ball will poses same potential energy because the potential energy their respective channels will possess some kinetic energy followings the laws of conservation of energy. Thus, the ball will have some velocity they will cover equal distance on the bottom of the channel because of the some velocity they will cover equal distance on the ground thus both the covers equal distance after rolling down the incline because they possessed some potential energy the top of the channels.
5 ➝ Law of Conservation of energy is demonstrated using this activity of the lop of channels the total mechanical energy. Now as the balls roll down they comes into motion. This motion shows than the balls nows possess kinetic energy too. As law of conservation of energy states that in potential energy of the balls [decrease into potential energy is due to decrease in height] Also when the ball reaches the bottom the total mechanical energy of the from of kinetic energy this shows that all the potential energy of the balls got converted to kinetic energy at the bottom.