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 force đ = (đđĖ+ đđŠĖ) newton is applied over a particle which displaces it from its origin to the point đ = (đđĖâ đđŠĖ)
meters. The work done on the particle is:
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 Ã đđ4 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.
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