Work, Power, & Simple Machines

Front

What is Work in physics?

Back

Work is defined as the product of force and the distance over which it acts. It is measured in Joules (J).

Front

What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is measured in Watts (W).

Front

How is Power calculated?

Back

Power (P) is calculated using the formula P = W/t, where W is work done in Joules and t is time in seconds.

Front

What is a Simple Machine?

Back

A simple machine is a device that changes the direction or magnitude of a force. Examples include levers, pulleys, and inclined planes.

Front

What are the six types of simple machines?

Back

The six types of simple machines are: lever, wheel and axle, pulley, inclined plane, screw, and wedge.

Front

What is a First Class Lever?

Back

A first class lever has the fulcrum positioned between the effort and the load. Example: seesaw.

Front

What is a Second Class Lever?

Back

A second class lever has the load positioned between the fulcrum and the effort. Example: wheelbarrow.

Front

What is a Third Class Lever?

Back

A third class lever has the effort applied between the fulcrum and the load. Example: tweezers.

Front

What is the formula for calculating Work?

Back

Work (W) is calculated using the formula W = F × d, where F is force in Newtons and d is distance in meters.

Front

What happens to Work if the distance is zero?

Back

If the distance is zero, then the work done is also zero, regardless of the force applied.