Name:________________________________________Date:_________________Period:____________
Power Practice Problems
 Power is the rate at which
is done. Power is measured in
.
 Rule for Power
Power
= Work
/ Time
(in _______) (in ______) (in ________)
Equation:
Now – Use these notes to do these practice problems. Show all your work.
1. If a person does 6000 Joules of work in one minute, what power has he?
2. A bulldozer does work at a rate of 12,000 N every minute. How powerful is it?
3. A car with a forward force of 6000 N drives a distance of 1 kilometer in 1 minute. How much
power does it have?
4. Two physics students, Will N. Andable and Ben Pumpiniron, are in the weightlifting room. Will lifts
the 100-pound barbell over his head 10 times in one minute; Ben lifts the 100-pound barbell over
his head 10 times in 10 seconds. Which student does the most work? Which student delivers the
most power?
5. If little Nellie Newton lifts her 40-kg body a distance of 0.25 meters in 2 seconds, then what is the
power delivered by little Nellie's biceps?
6. An escalator is used to move 20 passengers every minute from the first floor of a department store
to the second. The second floor is located 5-meters above the first floor. The average passenger's
mass is 60 kg. Determine the power requirement of the escalator in order to move this number of
passengers in this amount of time.