41.
If two bodies having masses m1 and m2 (m1 > m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.

42.
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

44.
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

46.
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

47.
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

48.
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

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