Energy Concepts Flashcard

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

Where is potential energy greatest on a roller coaster?

Back

At the top of a hill.

Front

What is kinetic energy?

Back

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

Front

How do you calculate the kinetic energy of an object?

Back

Use the formula KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What is the relationship between potential energy and height?

Back

Potential energy increases with height; the higher an object is, the more potential energy it has.

Front

If an object has 484 J of energy and weighs 8 kg, what is its velocity?

Back

11 m/s.

Front

How do you find the height of an object using potential energy?

Back

Rearrange the potential energy formula PE = mgh to find height: h = PE/(mg).

Front

What is the formula for gravitational potential energy?

Back

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

Front

If a toy helicopter weighs 3 kg and moves at 12 m/s, how much energy does it have?

Back

216 J.

Front

What is the potential energy of a 60 N child sitting on stairs 10 m high?

Back

600 J.