Question

Thrust on the unit surface area is called:

• A. Pressure
• B. Moment of force
• C. Couple
• D. Momentum

Answer 1

The correct option is A

Pressure

Explanation for the correct option

1. Pressure is defined as thrust acting per unit area of a body.
2. $Pressure=thrust/area$
3. SI unit of pressure is pascal (Pa).

Explanation for the incorrect options

1. The turning effect of force is known as the moment of force.
2. Couple is a pair of two equal and opposite forces whose line of action do not coincide.
3. Momentum is defined as the product of the mass and velocity of a body.

Hence, option (a) will be correct.