CPS M3 L1 & L2 Review

Front

What is work in physics?

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.

Front

What is the formula for calculating power?

Back

Power is calculated as Power = Work / Time.

Front

What is the unit of work?

Back

The unit of work is the Joule (J).

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is equivalent to one Joule per second.

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making work easier.

Front

Can a simple machine decrease the amount of work done?

Back

No, a simple machine cannot decrease the amount of work done; it can only change the way work is done.

Front

If a force of 10 N moves an object 5 m, how much work is done?

Back

Work = Force x Distance = 10 N x 5 m = 50 J.

Front

What is the relationship between work and energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object.

Front

What is the significance of the direction of force in work?

Back

Work is only done when the force applied and the direction of movement are in the same direction.

Front

True or False: A simple machine can help you do less work.

Back

False. A simple machine does not help you do less work; it helps you do work more efficiently.