Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces rub against each other.

Front

What type of energy is transferred by waves?

Back

Radiation is the movement of energy by waves, such as light and heat.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height. For example, a rock at the top of a cliff has high potential energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.

Front

How does height affect potential energy?

Back

The higher an object is, the more potential energy it has. For example, a rock at the top of a cliff has more potential energy than at the bottom.

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy increases with the square of the speed. If the speed doubles, the kinetic energy increases by four times.

Front

What is the formula for calculating potential energy?

Back

Potential Energy (PE) = mass (m) × gravity (g) × height (h).

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 1/2 × mass (m) × velocity (v)².

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).