The hanging bob of a simple pendulum is displaced to one extreme position B and then released. it swings towards centre position A and then to the other extreme position C. In which position does the bob have
(i) maximum potential energy?
(ii) maximum kinetic energy?
​Give reasons for your answer.
Answers
At position point B and point C bob posses maximum potential energy. At point A bob posses maximum kinetic energy.
Explanation:
1. Kinetic energy is energy posses by object due to its speed.
2. Potential energy is energy posses by object due to its height from reference position.
3. Mechanical energy is due to both kinetic energy and potential energy.
4. In case of pendulum reference position is taken at centre position point A.
5. As we know that total energy is constant. Means sum of kinetic energy and potential is constant.
6. Bob speed is zero at position B and C. So it can not posses kinetic energy. It contain only potential energy which is maximum. Means potential energy is maximum at point B and point C.
7. Bob at point A is on reference line. So its potential energy is zero at point A. It contain only kinetic energy which is maximum. Means kinetic energy is maximum at point A.