Physics
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
Related Questions
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 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.
A block slides down a frictionless incline. The sum of its P.E. and K.E. at every point :
- increases
- decreases
- remains constant
- first decreases and then increases
Which of the following is not an example of conservation of mechanical energy :
- free fall
- ideal pendulum
- block sliding down a rough surface
- satellite orbiting the earth