PreE 5.1 Levers and Mechanical Advantage

Front

What is the percentage of the input work that is converted to output work?

Back

Efficiency

Front

What is the rate at which work is done?

Back

Power

Front

Work done = Force x _________

Back

Distance

Front

What is always less than 100% in a machine?

Back

Efficiency

Front

If a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?

Back

5

Front

Define mechanical advantage.

Back

The ratio of the load force to the effort force in a machine.

Front

What is the formula for calculating efficiency?

Back

Efficiency = (Output Work / Input Work) x 100%

Front

What does a mechanical advantage greater than 1 indicate?

Back

The machine multiplies the input force.

Front

What is the unit of work?

Back

Joule (J)

Front

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

Back

Power = Work / Time