Advertisements
Advertisements
प्रश्न
A ball of mass M is moving with a speed v. What is its kinetic energy?
Advertisements
उत्तर
Kinetic energy of a ball of mass m and moving with speed v is K.E. = 1/2 Mv2
APPEARS IN
संबंधित प्रश्न
The kinetic energy of an object of mass m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?
The kinetic energy of a body is the energy by virtue of its ______.
Two bodies of equal masses are moving with uniform velocities v and 2v. Find the ratio of their kinetic energies.
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
How does the kinetic energy of a moving body depend on its (i) speed, and (ii) mass?
A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)
Explain the difference between potential energy and kinetic energy.
An apple falling from a tree is an example for kinetic energy.
The energy possessed by a cricket ball bowled by a player is ______.
A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:
- the work done by the engine.
- the power of the engine.
