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1.
Energy output in a device is equal to work done
by the load.
on the load.
by the effort.
on the effort.
2.
A machine is rated 5.30 W. In how many seconds will it do 212.0 J of work?
4.25 s
0.03 s
40.0 s
25.0 s
3.
An example of a simple machine is
sewing machine.
bicycle.
wheel and axle.
car.
4.
The energy output of a system is 40 J and the efficiency is 60%. Determine the energy input of the system.
50.0 J
66.7 J
24.0 J
75.4 J
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