Physics
A pendulum with a bob of mass m is oscillating on either side from its resting position A between the extremes B and C at a vertical height h above A. What is the kinetic energy K and potential energy U when the pendulum is at positions
(i) A, (ii) B and (iii) C?
Work, Energy & Power
59 Likes
Answer
(i) For position A,
Pendulum has the maximum kinetic energy and potential energy is zero at its resting position.
So, K = mgh and U = 0
(ii) For position B,
The kinetic energy starts decreasing and the potential energy starts increasing.
So, K = 0 and U = mgh
(iii) At position C,
Kinetic energy K = 0 and potential energy U = mgh.
Answered By
41 Likes
Related Questions
What do you understand by the conservation of mechanical energy? State the condition under which the mechanical energy is conserved.
Name two examples in which the mechanical energy of a system remains constant.
Name the type of energy possessed by the bob of a simple pendulum when it is at
(a) the extreme position,
(b) the mean position, and
(c) between the mean and extreme positions.
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
(i) the body is at the top,
(ii) the body has fallen a distance x,
(iii) the body has reached the ground.