Moments - [Mechanics 2].

Question 1

What is the moment of a force defined as?

Answer 1

Moment = Force x perpendicular distance from the point to the line of action of the force.

Question 2

What are the units for a moment?

Answer 2

…Nm (anti) clockwise.

Question 3

If something is in equilibrium, what can we assume…?

Answer 3

There is no forces acting on it.

Question 4

Sum of components vertically upwards = Sum of components ________________.

Answer 4

… vertically downwards.

Question 5

Sum of components to the left = Sum of components ________________.

Answer 5

… to the right.

Question 6

The total anticlockwise moment = ______________________________.

Answer 6

…The total clockwise moment.

Question 7

If a rod is uniform, where is the weight?

Answer 7

It will act through the centre of mass - centre of the rod.

Question 8

If a rod is uniform, where is the weight?

Answer 8

It won’t act at the centre of the rod.

Question 9

What force will be acting at a point where a rod is balanced on a support or pivot?

Answer 9

Normal Reaction Force.

Question 10

What happens when you take a moment from a point on a support or pivot?

Answer 10

You can cancel out the Normal Reaction Force.