Energy, Work and Power

Front

What is the definition of energy?

Back

Energy is the ability to do work or cause change.

Front

What is work in physics?

Back

Work is done when a force is applied to an object and the object moves in the direction of the force.

Front

What is the formula for calculating power?

Back

Power = Work / Time.

Front

What is the unit of power?

Back

The unit of power is the watt (W).

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, often used in cooking.

Front

How do simple machines make work easier?

Back

Simple machines make work easier by changing the direction of the force or increasing the distance over which the force is applied.

Front

What is mechanical advantage?

Back

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

Front

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

Back

Power is the rate at which work is done, calculated as work divided by time.

Front

What are the six types of simple machines?

Back

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