None of these
Equal to
Greater than
Less than

## Engineering Mechanics A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

None of these
The change in momentum suffered by rubber ball is more than the lead ball
The change in momentum suffered by rubber ball is less than the lead ball
Both the balls undergo an equal change in momentum

## Engineering Mechanics Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

Their algebraic sum is zero
The algebraic sum of their moments about any point in their plane is zero
Their lines of action are at equal distances
The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point

P / Q
P + Q
P - Q
Q / P

0.1 N-m
10 N-m
1 N-m
100 N-m

## Engineering Mechanics The bodies which rebound after impact are called

Elastic bodies
None of these
Neither elastic nor inelastic bodies
Inelastic bodies