Engineering Mechanics
According to Newton's first law of motion,

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
To every action, there is always an equal and opposite reaction
Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
None of these

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Engineering Mechanics
The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called

Newton's first law of motion
Newton's second law of motion
Principle of conservation of momentum
Principle of conservation of energy

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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:

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

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