MECHANICAL: Kinetic and Potential energy calculations

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height. It can be 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 can be calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

Back

2,450,000 J

Front

Calculate the kinetic energy of a cat with a mass of 5 kg running at a speed of 3 m/s.

Back

22.5 J

Front

What happens to kinetic energy when the speed of an object increases?

Back

The kinetic energy increases.

Front

What is the formula for calculating kinetic energy?

Back

KE = 1/2 mv²

Front

If a 5 kg body has a kinetic energy of 250 J, what is its velocity?

Back

10 m/s

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with an increase in mass, assuming velocity remains constant.

Front

What is the relationship between height and potential energy?

Back

Potential energy increases with an increase in height, assuming mass remains constant.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).