Question

An external influence that changes or tends to change the state of rest or uniform motion of a body or its dimension is called:

• A. Momentum
• B. force
• C. moment of force
• D. pressure

Answer 1

The correct option is B

force

Discussing Options

1. Option (a): Momentum is the product of mass and velocity.
2. It is zero when velocity is zero
3. Option (b): Force can change the state of rest or uniform motion of a body.
4. E.g. if a ball is at rest and if we apply force on it, it starts moving.
5. Option (c): The Moment of a force is a measure of its tendency to cause a body to rotate about its axis.
6. Option (d): Pressure is the perpendicular force per unit area.

Hence option (b) is correct.