A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the same mass to the
same height in 60 sec. The work done by them are in the ratio
A man weighing 500 N carries a load of 10 kg to the top of a building in 4 minutes. The work done by the man is 6 × 𝟏𝟎4 J. If he carries the same load in 8 minutes, the work done by the man will be:
. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly
another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does
work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.
A person holds a bucket of weight 60N. He walks 7 m along the horizontal path and then climbs up a vertical distance of 5 m. The work done by the man is:
A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25
joules, the angle which the force makes with the direction of motion of the body is?
You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process
you take 5 seconds. The work done by you will depend upon:
Two bodies moving towards each other collide and move away in opposite directions. There is some rise in
temperature of bodies because a part of the kinetic energy is converted into
