Energy, Work and Power

Front

What type of energy describes the movement of volleyball players?

Back

Mechanical energy.

Front

How do you calculate the kinetic energy of an object?

Back

Kinetic energy (KE) is calculated using the formula KE = 0.5 * mass * velocity^2.

Front

If a truck has a mass of 1120 kg and is moving at 40 m/s, what is its kinetic energy?

Back

The kinetic energy is 896,000 J.

Front

What is the total mechanical energy of a system with 12.4 J of potential energy and 23.5 J of kinetic energy?

Back

The total mechanical energy is 35.9 J.

Front

How do you calculate the potential energy of an object?

Back

Potential energy (PE) is calculated using the formula PE = mass * gravity * height.

Front

What is the potential energy of a 35 kg chair lifted 5 m off the ground?

Back

The potential energy is 1715 J.

Front

What is the kinetic energy of a 2 kg ball traveling at 4 m/s?

Back

The kinetic energy is 16 J.

Front

What is the relationship between work, energy, and power?

Back

Work is the transfer of energy, power is the rate at which work is done.

Front

Define mechanical energy.

Back

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

Front

What units are used to measure energy?

Back

Energy is measured in joules (J).