Force, Work, En...

A ball of mass 2 kg moves so that its position x as function of time t is given by x = t³/3. If x is measured in metres and 't' in seconds, what is the kinetic energy acquired by the particle in first two seconds?

A body is under the action of two equal and opposite forces, each of 3N and is displaced by 2 m. Which of the following is the value of work done by the body?

Which of the following increases with rise in ball that is projected upwards?

A bullet is fired into a block. Its velocity decreases by 50%, when it penetrates through 9 cm. What will be the total distance penetrated by the bullet?

To move a body along a curved horizontal path, several force varying magnitudes and directions are applied on the body. Initially, the body was at rest. The work done on the body will be equal to

The magnitude of the momentum of a particle is increased by 100%. If the initial kinetic energy is k, what will be the final kinetic energy?

A simple pendulum is vibrating in an evacuated chamber. It will oscillate with

What is the power developed by an engine in lifting water of 3000 litre from a well 20 m deep in one minute?(1 litre water = 1000 Kg; g = 10 m/s²)

A bomb of 12 kg explodes into two pieces of mass 4 kg and 8 kg. The velocity of 8 kg mass is 6 m/s.

What is the kinetic energy of the other mass?

What is the kinetic energy, if the momentum of a body is doubled?