1) What is power? a) how hard you can punch b) how strong you are c) the rate at which work is done d) the ON button on your computer 2) What is the formula for power? a) P= Wxt b) P=Fxd c) P=W/t d) P=W/F 3) In P=W/t, what is W? a) Work b) watts c) weight 4) In P=W/t, what is t? a) time b) temperature 5) What is the BASE UNIT for work? a) meters (m) b) Newtons (N) c) Joules (J) d) seconds (s) 6) What is the BASE UNIT for time? a) meters (m) b) Newtons (N) c) Joules (J) d) seconds (s) 7) Calculate the power if work done is 30,000 J and time is 100 s. a) 300 W b) 1500 W c) 30 W 8) Calculate Adam's power when it takes him 15 seconds to do 450 J of work. a) 400 W b) 30 W c) 435 W 9) How much work is done when a 1 kilogram mass is raised a vertical distance of 1 meter? (1kg = 10 N) a) 10 J b) 10 N c) 10 J/s d) 10 W 10) A microwave oven transfers 4000 J of energy in 5 seconds. Calculate Power. a) 900 J b) 800 W c) 900 kg d) 20,000 W 11) How much work is done when a 5 N force moves a block 4m? a) 20 N b) 20 J c) 1.5 W d) 0 J 12) Fred applies 350 N of force on a car, but it does not move. How much work did Fred do? a) 0J b) 2000 W c) 2000 J d) 450 J 13) You carry a 20 N bag of dog food up a 6m flight of stairs. How much work did you do? a) 1200 J b) 120 J c) 0 J d) 3.3 J 14) A kettle transfers 20,000 J of energy in 10 seconds. Calculate the kettle's Power. a) 200 W b) 200 J/s c) 2,000 J/s d) 2,500 W

Work and Power

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