# Quiz:Work and Power

 1. If a force moves an object or changes its direction, what is being done?A powerB energy in joulesC work 2. The unit used to measure Work is:A horsepowerB newtonsC joules 3. The rule for calculating Work is:A force × distanceB mass / volumeC energy / time 4. Who does more work - a man who lifts a large box from the ground up into the back of a truck, or a man who puts the same box on a trolley and wheels it up a ramp into the truck?A the man who lifts itB the man with the trolleyC they do the same work 5. A weightlifter lifts barbells of 200 newtons above his head to a height of 2 metres. How much work does he do?A 400 newtonsB 100 joulesC 400 joules 6. Energy and work use the same unit of the Joule because:A that is the unit chosen by the scientist named Pascal who studied heatB energy is required to do workC both measure the speed at which power is used 7. One kilojoule equals:A 1000 joulesB 100 joulesC 1⁄1000 joule 8. The old imperial unit for energy was the:A basal energy requirementB calorieC kilojoule 9. The rate at which work is done is called:ApowerBworkCenergy 10. Power is measured in: Ajoules Bwatts Cnewtons 11. The rule for the calculation of power is: Ajoules / seconds Benergy × time Cwork / time 12. 1 watt is equivalent to: A1 joule per second B1⁄10 newton per metre C1 newton metre 13. The old imperial unit for power was the: Akelvin Bhorsepower Ckilojoule 14. If 100 joules of work was done in 10 seconds, what power was used? A1 kilowatt B10 watts C1000 watts 15. If a weightlifter lifts 2000 newtons to a height of 2 metres in 4 seconds, how powerful is he? A1 horsepower B1 watt C1 kilowatt

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