06.03 Power Math Wkst
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I have reviewed the Power equation and know how to use the triangle trick for solving the problems.
I know that the unit for Power is Watts (W).
I know that the unit for Work is Joules (J).
I know that the unit for Time is seconds (s).
Known 1:
Known 2:
Show your work for solving the problem... You do 900 J of work in pushing a sofa. If it took 5 s to move the sofa, what was your power in watts?
What is the value for the unknown that you solved for in question 7? Label your answer!
Known 1:
Known 2:
Show your work for solving the problem... If a runner’s power is 130 W, how much work is done by the runner in 600 s?
What is the value for the unknown that you solved for in question 11? Label your answer!
Known 1:
Known 2:
Show your work for solving the problem... The power produced by an electric motor is 500 W. How long will it take the motor to do 10,000 J of work?
What is the value for the unknown that you solved for in question 15? Label your answer!
Known 1:
Known 2:
Show your work for solving the problem... To lift a baby from a crib, 50 J of work is done. How much power is needed if the baby is lifted in 0.5 s?
What is the value for the unknown that you solved for in question 19? Label your answer!
Known 1:
Known 2:
Show your work for solving the problem... A color TV uses 120 W of power. How much energy does the TV use in 3,600 s?
What is the value for the unknown that you solved for in question 23? Label your answer!
Known 1:
Known 2:
Show your work for solving the problem... A car’s engine produces 1,000,000 watts of power. How much work does the engine do in 30 s?
What is the value for the unknown that you solved for in question 27? Label your answer!