Conservation of Energy

Front

What is the Law of Conservation of Energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What type of energy is associated with an object's motion?

Back

Kinetic energy.

Front

What is gravitational potential energy?

Back

The energy an object possesses due to its position in a gravitational field, calculated as PE = mgh (mass x gravity x height).

Front

If a diver has 36,750 J of gravitational potential energy at the top of a cliff, how can you find the height of the cliff?

Back

Use the formula PE = mgh and solve for height (h).

Front

A ball has 17 J of kinetic energy and a total energy of 25 J. How do you calculate its gravitational potential energy?

Back

Subtract kinetic energy from total energy: PE = Total Energy - KE = 25 J - 17 J = 8 J.

Front

What happens to gravitational potential energy as an object falls?

Back

It decreases as the object loses height.

Front

How do you calculate kinetic energy?

Back

KE = 1/2 mv² (where m is mass and v is velocity).

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy increases with the square of the speed; if speed doubles, kinetic energy increases by a factor of four.

Front

What is the formula for calculating gravitational potential energy?

Back

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

Front

If a car's mass is 60 kg and it loses 11,760 J of gravitational potential energy, how do you find the height it descended?

Back

Use the formula PE = mgh and solve for height (h).