Name:____________________________________Date:_______________Hour:_______crane

ProblemSet: 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 lifts a 1250 N barbell 2 m in 3 s.  How much power was used to lift the barbell?

 

 

2.  A crane lifts a steel girder in 45s.  It required the crane to do 8750000 J of work.  How much power did the crane use?

 

 

3.  The power produced by an electric motor is 400W.  How long will it take the motor to do 10,000 J of work?

 

 

4.  How much work is done by a babysitter who uses 45000 W of power to lift a baby in 4s?

 

 

5.  What is the power of a toaster if it can perform 3500 J of work in 3 minutes?