Potential and Kinetic Energy

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. For gravitational potential energy, it is calculated using the formula PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the formula for calculating kinetic energy?

Back

KE = 1/2 mv², where KE is kinetic energy, m is mass, and v is velocity.

Front

What is the formula for calculating potential energy?

Back

PE = mgh, where PE is potential energy, m is mass, g is acceleration due to gravity, and h is height.

Front

How does mass affect kinetic energy?

Back

Kinetic energy is directly proportional to mass. If the mass of an object increases, its kinetic energy increases if the velocity remains constant.

Front

How does velocity affect kinetic energy?

Back

Kinetic energy is proportional to the square of the velocity. If the velocity of an object doubles, its kinetic energy increases by a factor of four.

Front

What is the relationship between potential energy and height?

Back

Potential energy increases with height. The higher an object is positioned, the more potential energy it has due to the gravitational force acting on it.

Front

If a 10 kg box is at a height of 5 m, what is its potential energy? (g=9.8 m/s²)

Back

PE = mgh = 10 kg * 9.8 m/s² * 5 m = 490 joules.

Front

What happens to kinetic energy when an object comes to a stop?

Back

When an object comes to a stop, its kinetic energy becomes zero because its velocity is zero.

Front

What is the unit of energy?

Back

The unit of energy is the joule (J).