Work, Energy, and Power

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) = 0.5 * mass (m) * velocity (v)^2.

Front

What is potential energy associated with?

Back

Potential energy is associated with the position of an object in a gravitational field.

Front

How does mass affect kinetic energy?

Back

Kinetic energy increases with the square of the velocity and is directly proportional to mass.

Front

What happens to kinetic energy when speed is tripled?

Back

Kinetic energy increases by a factor of nine (since KE is proportional to the square of velocity).

Front

What is the relationship between potential energy and height?

Back

Potential energy (PE) = mass (m) * gravitational acceleration (g) * height (h).

Front

What is mechanical energy?

Back

Mechanical energy is the sum of kinetic energy and potential energy in a system.

Front

What effect do external forces have on mechanical energy?

Back

External forces can convert mechanical energy into other forms of energy, changing the total mechanical energy of the system.

Front

At which point does a roller coaster have the most kinetic energy?

Back

A roller coaster has the most kinetic energy at the lowest point of the track.

Front

If a 1300-kg car has 19500 J of potential energy, how high was it lifted?

Back

The car was lifted 1.5 m.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).