A block of mass 5 kg is raised from the bottom of the lake to a height of 3m without change in kinetic energy. If the density of the block is `3000 kg m^(-3)`, then the work done is equal to.

If the density of a block is 981 kg//m^(3) then it shall

A body of mass 10 kg is raised by 5m . What is the work done ?

A block of mass 4kg is released from the top of a rough inclines plane of height 10 m . If velocity of the block is 10 m//s at the bottom of the inclined then work done by the friction force on the block will be

A block of mass 4kg is released from the top of a rough inclines plane of height 10 m . If velocity of the block is 10 m/s at the bottom of the inclined then work done by the friction force on the block will be

A body of mass 12 kg is at the bottom of a lake of depth 5 m. If the work done in raising the body to the water surface is 350 J, the specifice gravity of the body is

A ball is released from the bottom of a tank filled with water up to 2m. On reaching the top its kinetic energy is found to be 16 J. Mass of the ball is 2 kg. Density of the ball in (kg)/(m^(3)) is

A disc of mass 3 kg rolls down an inclined plane of height 5 m. The translational kinetic energy of the disc on reaching the bottom of the inclined plane is