Name:____________________________________Date:_______________Hour:_______crane

ProblemSet: Power

         power                         

P stands for _______________ and is measured in ______________(_______)
W stands for _______________ and is measured in ______________(_______)
t stands for _______________ and is measured in ______________(_______)
F stands for _______________ and is measured in ______________(_______)
d stands for _______________ and is measured in ______________(_______)

1.  A weightlifter uses 600 N of force to lift a barbell 2 m in 3 s.  How much power was used to lift the barbell?

P=
W =
t =
F=


2.  A crane lifts a steel girder in 40s.  It required the crane to do 800,000 J of work.  How much power did the crane use?

P=
W =
t =


3.  The power produced by an electric motor is 500W.  How long will it take the motor to do 1,000 J of work?

P=
W =
t =

4.  How much work is done by a babysitter who uses 8000 W of power to lift a baby in 2s?

P=
W =
t =

5.  What is the power of a toaster if it can perform 3000 J of work in 3 seconds?

P=
W =
t =