Physics
A pendulum is oscillating on either side of its rest position. The correct statement is :
- It has only the kinetic energy at its each position.
- It has the maximum kinetic energy at its extreme position.
- It has the maximum potential energy at its mean position.
- The sum of its kinetic energy and potential energy remains constant throughout the motion.
Work, Energy & Power
2 Likes
Answer
The sum of its kinetic and potential energy remains constant throughout the motion.
Reason — The sum of kinetic and potential energy does not remain constant throughout the motion of a pendulum. It varies as the pendulum swings due to the interconversion of kinetic and potential energy. However, the sum of kinetic and potential energy is constant if we consider the entire system (kinetic energy + potential energy = mechanical energy), as long as there are no external forces like friction acting on the pendulum.
Answered By
2 Likes
Related Questions
A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. The correct statement is:
- Potential energy of the ball at the ground is mgh.
- Kinetic energy of the ball at the ground is zero.
- Kinetic energy of the ball at the highest point is mgh.
- Potential energy of the ball at the highest point is mgh.
A a body is released from a height. During its motion in striking the ground, the quantity which does not change is:
- momentum
- kinetic energy
- potential energy
- mechanical energy
A simple pendulum while oscillating rises to a maximum vertical height of 7 cm from its rest position where it reaches its extreme position on one side. The mass of the bob of simple pendulum is 400 g and g = 10 m/s2. The total energy of the simple pendulum at any instant while oscillating is:
- 0.28 J
- 2.8 J
- 28 J
- 28000 J
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?