Unit 4 Ticket to Retake (Energy)

Front

What is the maximum gravitational potential energy of a ball tossed into the air with a maximum kinetic energy of 11.14 joules?

Back

11.14 joules

Front

What does the Law of Conservation of Energy state?

Back

The total amount of energy is conserved before and after a reaction.

Front

What is the formula to calculate the velocity of an object just before it hits the ground?

Back

v = √(2gh), where g is the acceleration due to gravity and h is the height.

Front

What is the total mechanical energy of a system?

Back

The sum of potential energy and kinetic energy in the system.

Front

What type of energy is associated with the motion of an object?

Back

Kinetic energy.

Front

If a 30 kg crate is lifted to a height of 35m, what is its gravitational potential energy?

Back

Potential Energy = mgh = 30 kg * 9.81 m/s² * 35 m = 10285.5 joules.

Front

What is the relationship between kinetic energy and potential energy in a closed system?

Back

As kinetic energy increases, potential energy decreases, and vice versa, maintaining total energy conservation.

Front

Define kinetic energy.

Back

The energy an object possesses due to its motion, calculated as KE = 1/2 mv².

Front

What is potential energy?

Back

The energy stored in an object due to its position or configuration, calculated as PE = mgh.

Front

What happens to the total mechanical energy of a roller coaster car at the top of a hill?

Back

It is at its maximum potential energy and minimum kinetic energy.