We define power as. In the past the fuel could just possibly have been coal.
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Power work.
Work and power worksheet pdf. If the pump s power output is 250 horsepower how long will it take to pump all 3000 gallons to reservoir. Work energy and power worksheet pdf. A person of mass 70kg runs up a flight of stairs with a vertical height of 5m.
Please circle your final answer and be sure it has the proper label. No body last modified by. Wd e p mgh 70 x 10 x 5 3500j.
P 2 07 104watts 2 a 0 45 kg book sits on a shelf 1 80 m above the floor. What work has been done. Work and power worksheet answer each question by calculating for the missing variable.
Work power worksheet. A ball with a weight of 30 newtons is kicked 2 metres into the air. Energy work and power energy if you own a car it will not move without fuel.
If you do 2 7 j. P f x d t power is measured in watts. A calculate the gravitational potential energy of the book relative to the floor.
E p 7 95j. Why are both energy and work measured in joules. Power work done time taken and using symbols we write this as.
Power is measured in joules per second j s r o watts w and is worked out using the formula. For instance when a block is being pulled with tension t by a string whose angle of inclination is θ to the horizontal. Work power worksheet author.
The concept of power is concerned with how rapidly energy is being transferred or transformed when work is done. But whatever fuel you use you are buying something with the. Power is measured in.
Power is the rate at which is done. It is the rate of work done or rate of energy transfer. Rule for power power work time in watts in joules in seconds p w t questions 1.
In physics power is associated with energy and has a precise meaning. Worksheet work power and energy sections 9 1 9 6 1 what is the power of a crane that does 5 80 x 104 j of work in 2 80 s. At present this fuel could be petrol or alcohol or diesel fuel.
Be sure to show all calculation work in the space provided. The unit of work is the joule j consider a force that acts at an angle. And in the future it could be hydrogen or electricity stored in a battery.
Much work is done express your answer in both english and metric units of work. You must exert a force of 4 5 n on a book to slide it across a table. 1 25 2014 4 58 00 pm company.
Pf1 5 work energy and power page 2 of 5 june 2012 note. Work energy and power this worksheet and all related files are licensed under the creative commons attribution license. Work is a scalar quantity.
If the trip takes 7s to complete calculate the person s power.
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