Work, Power, Simple Machines

Front

What is Work?

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 Power?

Back

Power is the rate at which work is done or energy is transferred. It is calculated as Power = Work / Time.

Front

What is Mechanical Advantage (MA)?

Back

Mechanical Advantage is the ratio of the output force to the input force in a machine. It indicates how much a machine multiplies force.

Front

How do you calculate Mechanical Advantage?

Back

Mechanical Advantage (MA) = Output Force / Input Force.

Front

What is the unit of Work?

Back

The unit of Work is the Joule (J), which is equivalent to one Newton meter (N·m).

Front

What is the unit of Power?

Back

The unit of Power is the Watt (W), which is equivalent to one Joule per second (J/s).

Front

What is an example of a simple machine?

Back

Examples of simple machines include levers, pulleys, inclined planes, wedges, screws, and wheel and axle.

Front

In which situation is work not done?

Back

Holding a 20-pound box above the floor is an example where work is not done, as there is no movement in the direction of the force.

Front

If a force of 20N moves an object 5M, how much work is done?

Back

Work = Force x Distance = 20N x 5M = 100J.

Front

What is the relationship between work and energy?

Back

Work transfers energy from one object to another. When work is done, energy is transferred.