KE, PE Flashcard

Front

What is Kinetic Energy (KE)?

Back

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

Front

What is Potential Energy (PE)?

Back

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

Front

True or False: The people at the bottom of the hill have mostly potential energy.

Back

False. They have mostly kinetic energy as they are at a lower height.

Front

How do you calculate the speed of an object if you know its kinetic energy?

Back

Use the formula KE = 1/2 mv². Rearranging gives v = sqrt(2KE/m).

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

Where is Potential Energy the greatest in a gravitational field?

Back

Potential Energy is greatest at the highest point in a gravitational field.

Front

The faster an object moves, the ________ kinetic energy it has.

Back

more. Kinetic energy increases with the square of the speed.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to mass; if mass increases, kinetic energy increases if velocity remains constant.

Front

What is the relationship between height and potential energy?

Back

Potential energy is directly proportional to height; as height increases, potential energy increases.

Front

What type of energy does a person climbing a ladder have?

Back

Both kinetic and potential energy.