Physics
A pendulum is oscillating on either side of its rest position. Explain the energy changes that take place in the oscillating pendulum. How does the mechanical energy remain constant in it? Draw necessary diagram.
Work, Energy & Power
101 Likes
Answer
The kinetic energy decreases and the potential energy becomes maximum at B.
After a moment the to and fro movement starts again.
So, from B to A, again the potential energy changes into kinetic energy and this process repeat again and again.
So, when the bob in its state of to and from movement it has potential energy at the extreme position B or C and kinetic energy at resting position A.
It has both the kinetic energy and potential energy at an intermediate position.
However, the sum of kinetic and potential energy remain same at every point of movement.
Answered By
68 Likes
Related Questions
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.
A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20ms-1. Calculate the maximum potential energy it gains as it goes up.
A stone of mass 500 g is thrown vertically upwards with a velocity of 15ms-1.
Calculate:
(a) the potential energy at the greatest height,
(b) the kinetic energy on reaching the ground
(c) the total energy at its half waypoint.