Work and Energy

Front

What is work?

Back

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

Front

What is energy?

Back

Energy is the ability to do work.

Front

What is a machine?

Back

A machine is a device that changes the force or increases the motion from work.

Front

What are simple machines?

Back

Simple machines are devices that make work easier, such as levers, pulleys, and wheels.

Front

Which of the following is NOT a simple machine?

Back

Motor is not a simple machine.

Front

What is the law of conservation of energy?

Back

The total amount of energy in a closed system remains constant.

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.

Front

How is work calculated?

Back

Work is calculated as the product of force and the distance moved in the direction of the force (W = F × d).

Front

What is power?

Back

Power is the rate at which work is done or energy is transferred.