Question

a simple pendulum consists of a string of length 50.cm and a pendulum bob of mass 10g. The string hangs vertically from a fixed point O with the pendulum bob attached to its lower end at point P. The pendulum bob is displaced to point R, 2.0 cm above P and released from rest. Asuming air resistance is negligible, calculate
a) gain in potential energy of the pendulum bob at point R;

b) kinetic energy of the bob at point Q, 0.5 cm above P.

Answer 1

Answer:

A simple pendulum of length 50 cm is suspended from a fixed point O and a nail is fixed at a point P which is vertically below O at some distance.

40 cm · Video Explanation · Answer · When the ball just reaches the bottom, from conservation of energy, v2=2 gL But when it reaches the bottom, it describes a vertical circle. hence v2=5gr where r is the radius of the circle

Explanation:

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