Potential and Kinetic Energy

Front

What is potential energy?

Back

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

Front

What is kinetic energy?

Back

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

Front

How does halving the height of an object affect its potential energy?

Back

Halving the height of an object reduces its potential energy to half of the original value.

Front

What type of energy is represented by the wind blowing through your hair?

Back

The wind blowing through your hair is a type of kinetic energy.

Front

What type of energy is represented by a bowling ball rolling down the alley?

Back

A bowling ball rolling down the alley is a type of kinetic energy.

Front

Calculate the kinetic energy of a car traveling at 40 m/s with a mass of 1120 kg.

Back

The kinetic energy is 896,000 J.

Front

Calculate the gravitational potential energy of a baby carriage with a mass of 1.2 kg at a height of 21 m.

Back

The gravitational potential energy is 246.96 J.

Front

What happens to potential energy when an object is raised to a higher position?

Back

The potential energy increases as the height of the object increases.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to the mass of the object; as mass increases, kinetic energy increases.

Front

What is the relationship between velocity and kinetic energy?

Back

Kinetic energy is proportional to the square of the velocity; if velocity doubles, kinetic energy increases by a factor of four.