explain how the law of conservation of energy holds true for three different position of the bob.

Asked by nathsantanukumar | 11th Apr, 2018, 04:59: PM

Expert Answer:

The swinging pendulum can either possess the kinetic energy or potential energy. 
When the  bob is at position B it possesses only the potential energy and not the kinetic energy. When it moves towards the point A its potential energy goes on decreasing. And kinetic energy goes on increasing.
When it reaches at point A it possesses only kinetic energy. 
When it again tends to move towards the point C kinetic energy starts getting converted to potential energy.
Thus at extreme positions B and C, the potential energy is maximum. While at mean position kinetic energy is maximum.
Thus the total energy at every instant of a time is constant. This proves the law of conservation of energy.

Answered by Shiwani Sawant | 12th Apr, 2018, 01:00: PM