Work, Power and Machines

Front

What is the force applied to a machine called?

Back

effort force

Front

What is input distance in the context of machines?

Back

The distance the input force acts through.

Front

How do you calculate work done if power and time are known?

Back

Work done (J) = Power (W) × Time (s)

Front

What is the unit of power in the International System of Units (SI)?

Back

Watt (W)

Front

What is the relationship between work, power, and time?

Back

Power is the rate at which work is done over time.

Front

What is a simple machine?

Back

A device that changes the direction or magnitude of a force.

Front

What type of simple machine is a lever?

Back

A rigid bar that pivots around a fulcrum.

Front

What is the mechanical advantage of a machine?

Back

The ratio of the output force to the input force.

Front

What is an example of a situation where no work is done?

Back

Carrying a heavy object while standing still.

Front

What type of simple machine is a wheel and axle?

Back

A machine consisting of a wheel attached to a shaft (axle) that rotates together.