Movement of forces

Question 1

What is the SI unit of moment of a force?

Answer 1

Nm (Newton metre)

Question 2

What is moment of a force?

Answer 2

The moment of a force is the product of the force and the perpendicular distance from the pivot to the line of action of the force.

Question 3

Formula of moment of forces?

Answer 3

Moment (Nm) = Force (N) x Perpendicular distance from the pivot (m)

Question 4

What is the direction of Moment of a Force?

Answer 4

Clockwise and anticlockwise. Moment of forces can be added up if they are in the same direction.

Question 5

What are the factors affecting Moment of a Force?

Answer 5

1. Magnitude of force applied
   - the stronger the applied force, the stronger the moment of a force
2. Perpendicular distance of the applied force from the pivot
   - the longer the distance of the applied force from the pivot, the stronger the moment of the force.

Question 6

What is the principle of moments?

Answer 6

The principle of moments states that when a body is in equilibrium, the sum of clockwise moments about a pivot is equal to the sum of the anticlockwise moments about the same pivot.

Question 7

Formula of principle of moments?

Answer 7

Sum of clockwise moments = Sum of anticlockwise moments