Calculate the gain in kinetic engery of a body of mass 10 kg after falling from rest for 2 seconds.

What is the kinetic energy of a body of mass 50 kg after it has fallen from rest for 5 seconds? (g = 9.8 m/s^2 )

What is the momentum of a body of mass 10kg when it is at rest?

A body of mass 2 kg initially at rest moves under the action of 0 an applied horizontal force of 7 N on a table with coefficient of kinetic friction= 0.1. Compute the change in kinetic energy of the body in 10 s, and interpret your results

Calculate the rotation kinetic energy of the earth about its own axis. (M= 6 times 10^24 kg and R = 6400km)

Calculate the moment of inertia of earth about its diamter taking mass 10^25 kg and diameter 12800km.

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s^-1 to 3.5 m s^-1 in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?

Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg, (a) just after it is dropped from the window of a stationary train,(b) just after it is dropped from the window of a train running at a constant velocity of 36 km/h,just after it is dropped from the window of a train accelerating with 1 ms^2,just after it is dropped from the window of a train accelerating with 1M/S2

Calculate the power of a motor in kilo-watt ,which is capable of rising 200 kg of water in five minutes from a ell 120 meter deep [ g=10ms^-2 ].

A body of mass 15 kg is moving with a velocity 20 m/s. Calculate the distance travelled by the body before stopping, if a force of 30 N is applied on the body in the direction opposite to the direction of motion.