Moments and Centre of Mass

Front

What is a moment in physics?

Back

A moment is the measure of the tendency of a force to rotate an object about an axis or pivot. It is calculated as the product of the force and the distance from the pivot point.

Front

What is the formula for calculating the moment?

Back

Moment (M) = Force (F) × Distance (d) from the pivot.

Front

What is the SI unit of moment?

Back

The SI unit of moment is Newton meter (Nm).

Front

What does clockwise moment mean?

Back

A clockwise moment is the rotational effect of a force that tends to rotate an object in the direction of the hands of a clock.

Front

What does anticlockwise moment mean?

Back

An anticlockwise moment is the rotational effect of a force that tends to rotate an object in the opposite direction to the hands of a clock.

Front

How do you determine the direction of a moment?

Back

The direction of a moment is determined by the direction of the applied force and the position of the pivot point.

Front

What is the principle of moments?

Back

The principle of moments states that for an object in equilibrium, the sum of clockwise moments about a pivot is equal to the sum of anticlockwise moments.

Front

If a 15 N force is applied at a distance of 0.1 m from the pivot, what is the moment?

Back

Moment = 15 N × 0.1 m = 1.5 Nm (anticlockwise).

Front

What is the moment produced by a 10 N force applied 2 m from the pivot?

Back

Moment = 10 N × 2 m = 20 Nm (direction depends on the force application).

Front

What is the center of mass?

Back

The center of mass is the point in an object where the mass is evenly distributed in all directions.