Energy Unit Review

Front

What is the effort force in a machine?

Back

The effort force is the force applied by the user to operate the machine, not the force exerted by the machine itself.

Front

What unit is used to measure frequency?

Back

Hertz (Hz) is the unit used to measure frequency.

Front

What must a weight lifter do to perform work with barbells?

Back

The weight lifter must lift the barbells straight up to perform work.

Front

Which wave has the lowest frequency?

Back

Wave #3 has the lowest frequency.

Front

What happens to the wavelength if the frequency is doubled while speed remains constant?

Back

The wavelength is halved.

Front

Define work in physics.

Back

Work is done when a force causes an object to move in the direction of the force.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.

Front

What is the relationship between frequency and wavelength?

Back

Frequency and wavelength are inversely related; as frequency increases, wavelength decreases.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state.