c7_Potential and Kinetic Energy (Universe)

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 stored energy of an object due to its position or state. It is often associated with gravitational potential energy, calculated as PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

At which point is kinetic energy greatest on a ramp?

Back

Kinetic energy is greatest at the bottom of the ramp, where the object has converted all its potential energy into kinetic energy.

Front

If two objects have the same potential energy at the top of a ramp, what can be said about their kinetic energy at the bottom?

Back

If they have the same potential energy at the top, they will have the same kinetic energy at the bottom, assuming no energy is lost to friction.

Front

How do you calculate the kinetic energy of an object?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its height above the ground. It is calculated using the formula PE = mgh.

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, assuming no energy is lost to friction.

Front

What is the unit of energy in the International System of Units (SI)?

Back

The unit of energy in the SI system is the Joule (J).

Front

Give an example of an object with kinetic energy.

Back

A tennis ball rolling across the court is an example of an object with kinetic energy.

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 if velocity remains constant.