Moments, levers and gears

What may a force or a system of forces cause an object to do?

Cause an object to rotate

What is the moment of a force?

The turning effect of a force

What is the size of a moment?

The product of a force and the perpendicular distance for the pivot to the line of action of the force

If an object is balanced, what is the relationship between the total clockwise moment and the total anti-clockwise moment about a pivot?

Equal

What can be used to transmit the rotational effect of forces?

A simple lever and a simple gear system can be used to transmit the rotational effects of forces

What are gears?

Circular disks with interlocking teeth around their edges which rotate about axles.

What is a Moment?

A rotational or turning effect if a force

How do you measure the distance when calculating moments?

the perpendicular distance between the force and the pivot

What is the formula for calculating moments?

M = Fd

What is a Lever?

A device that increases the size of the force acting on the object, in order to make the object turn more easily

How does a lever work?

by transmitting the turning effect of the force