Work & Mechanical Advantage, Part 1

Front

What is work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

How much work is done in holding an object still?

Back

0 J (Joules) because there is no movement, and work requires movement in the direction of the force.

Front

What is a fixed pulley?

Back

A fixed pulley is a simple machine that changes the direction of the force applied to lift a load.

Front

What does mechanical advantage mean?

Back

Mechanical advantage is the ratio of the output force exerted by a machine to the input force applied to it.

Front

How do you calculate mechanical advantage?

Back

Mechanical Advantage = Load Force / Effort Force.

Front

What is effort force?

Back

Effort force is the force that a person or machine exerts to move an object.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.

Front

What is the unit of work?

Back

The unit of work is the Joule (J).

Front

What is the purpose of a simple machine?

Back

The purpose of a simple machine is to make work easier by allowing us to apply less force over a greater distance.

Front

What happens to the input force when using a lever with mechanical advantage?

Back

The input force is reduced, allowing a smaller force to lift a larger load.