Efficiency Practice

Front

What is the equation for efficiency of a machine?

Back

Front

What unit is used for work output?

Back

Joules (J)

Front

What unit is used for work input?

Back

Joules (J)

Front

What unit is used for efficiency?

Back

Percent (%)

Front

If a machine inputs 100 J of work and outputs 50 J, what is its efficiency?

Back

50%

Front

What does it mean if a machine has an efficiency greater than 100%?

Back

It indicates that the machine is producing more work output than the work input, which is impossible due to the conservation of energy.

Front

What is the relationship between work input and work output in a machine?

Back

Work input is the energy supplied to the machine, while work output is the energy produced by the machine.

Front

How do you calculate work output from efficiency and work input?

Back

Front

How do you calculate work input from efficiency and work output?

Back

Front

What is the significance of a machine's efficiency?

Back

It indicates how well the machine converts input energy into useful output energy.