Unit 4 Review

Front

Calculate MA: input force = 6.3 N; output force = 8.6 N

Back

1.37

Front

What is the formula for work?

Back

W = Fd

Front

Calculate the efficiency: work input = 25 J; useful work output = 20 J

Back

80 %

Front

Light energy travels from the sun to Earth across empty space in the form of electromagnetic waves. True or False?

Back

True

Front

Solve for Efficiency: work input = 157 J; useful work output = 249 dJ

Back

0.159

Front

What is Mechanical Advantage (MA)?

Back

The ratio of output force to input force.

Front

Define Efficiency in the context of machines.

Back

Efficiency is the ratio of useful work output to work input, expressed as a percentage.

Front

What is the unit of work in the International System of Units (SI)?

Back

Joule (J)

Front

What does the formula W = Fd represent?

Back

Work is equal to force multiplied by distance.

Front

How do you calculate efficiency?

Back

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