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

At which point on a roller coaster is the gravitational potential energy at its maximum?

Back

At the highest point of the roller coaster.

Front

At which point on a roller coaster is the kinetic energy at its maximum?

Back

At the lowest point of the roller coaster.

Front

What happens to potential energy (PE) and kinetic energy (KE) as an object moves from a high position to a low position?

Back

The PE decreases while the KE increases.

Front

What is gravitational potential energy (GPE)?

Back

The energy an object possesses due to its height above the ground, calculated as GPE = mgh (mass x gravity x height).

Front

If a 1.0 kg ball is at the top of a 10.0 m hill, what is its gravitational potential energy?

Back

98 joules (using GPE = mgh, where g = 9.8 m/s²).

Front

What happens to the total mechanical energy of a system if no external forces act on it?

Back

The total mechanical energy remains constant.

Front

What is kinetic energy (KE)?

Back

The energy an object possesses due to its motion, calculated as KE = 1/2 mv² (1/2 x mass x velocity squared).

Front

How does energy transformation occur in a pendulum?

Back

At the highest point, energy is mostly potential; at the lowest point, energy is mostly kinetic.

Front

What is an example of energy transformation in a roller coaster?

Back

As the coaster climbs, kinetic energy is converted to potential energy; as it descends, potential energy is converted back to kinetic energy.