Work, Energy an...

A ball dropped from a height of 2 m rebounds to a height of 1.5 m after hitting the ground. Then, the percentage of energy lost is

A particle is projected from the ground with a kinetic energy E at an angle of 60° with the horizontal. Its kinetic energy at the highest point of its motion will be

A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel? (take, g =10 ms^-2)

Two balls of masses 2 g and 6 g are moving with kinetic energy in the ratio of 3 : 1. What is the ratio of their linear momenta?

If the kinetic energy of a body is increased two times, its momentum will

A 16 kg block moving on a frictionless horizontal surface with a velocity of 4 m/s compresses an ideal spring and comes to rest. If the force constant of the spring be 100 N/m, then the spring is compressed by

A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms^-1. The kinetic energy of the other mass is

Which of the following statements is wrong?

Two rectangular blocks A and B of masses 2 kg and 3kg respectively are connected by a spring of spring constant 10.8 Nm^-1 and are placed on a frictionless horizontal surface. The block A was given an initial velocity of 0.15 ms^-1 in the direction shown in the figure. The maximum compression of the spring during the motion is