Work, Energy and Power

Related Questions

• A body of mass 50 kg is projected vertically upwards with velocity of 100 m/sec. 5 seconds after this body breaks into 20 kg and 30 kg. If 20 kg piece travels upwards with 150 m/sec, then the velocity of other block will be

  ---

• A spring of spring constant 5 ? 103 N/m is stretched initially by 5cm from the unstretched position. Then the work required to stretch it further by another $5cm$ is

  ---

• A body of mass 0.1 kg moving with a velocity of 10 m/s hits a spring (fixed at the other end) of force constant 1000 N/m and comes to rest after compressing the spring. The compression of the spring is

  ---

• If the unit of force and length each be increased by four times, then the unit of energy is increased by

  ---

• If a force F is applied on a body and it moves with a velocity v, the power will be

  ---