WS 09001 NAME DATE WORK PROBLEMS 1

6 REPÚBLICA DE COLOMBIA EXPEDIENTE NO 19200900133 01
ÖPPET HUS HOS KUNGÄLV ENERGI LÖRDAG 1A SEPTEMBER 09001500
生化檢驗項目批價代碼 09001C － CHOLESTERO1TOTAL 09002C － BUN (BLOOD) 09003C

第（九）類 著色劑 § 09001 食用紅色六號 NEW COCCIN（FOOD RED NO6）
ДО СКВИРСЬКОГО РАЙОННОГО СУДУ КИЇВСЬКОЇ ОБЛАСТІ 09001 КИЇВСЬКА ОБЛ
EKSAMEN I BØ300 BEDRIFTSØKONOMI II TID 09001400 DATO 12062008

ws 09001

ws 09001 Name __________________

Date ___________________


Work Problems


  1. And 80.0kg person carries a 25N package up a flight of stairs. The vertical height of the stairs is 10.0m. How much work is done? (8100J)





  1. A force of 1800Nis needed to keep a piano from sliding down a 10.0m ramp. How much work is done? (Zero)




  1. A child pulls a sled through the snow with a force of 45N applied to the rope at an angle of 30.0degrees with the horizontal.

    1. How much work is done if they moved 15m? (584J)




    1. How much work would have been done if the rope had been pulled horizontally with the same force? (675J)




  1. It takes 7500J of work to slide a crate a distance of 15m across a floor. A force of 650N was applied to the rope. What angle did the rope make with the ground? (39.7 degrees)





  1. It took a force of 250N to pull a crate weighing 765N across the floor. The work done was 3500J. How far was the crate moved? (14m)




  1. The third floor of a house is 8.0m above the street level. How much work is required to move a 150.kg refrigerator up to the third floor? (11,760J)




  1. A crane lifts a 2.25x103N bucket containing 500.kg of dirt to a height of 7.50m. Calculate the work performed in (a) N-m (b) joules (same units 54,375J)


  1. How much work must be done to lift a 49kg crate a distance of 10.m? (4800J)






  1. A man carries bricks, weighting 30.N each, up a ladder onto a scaffold 10.m high. He can carry 8 bricks per minute. How much work is done by the worker in

      1. 30.min (b) 2 hours? (72,000J, 288,000J or 72kJ, 288kJ)





  1. A tractor pulls a plough through a field. The tension (force) on the rope is 2000.N. It makes an angle of 40degrees with the ground. If the field is 300m long, how much work is done? (459,600J)






  1. A man throws a rope around a lion and drags him across the floor. He needs a force (tension) of 400.N to do this. The rope makes an angle of 40.degrees with the floor. What work is done if the lion is dragged 50.m? (15,321J)







  1. An 8.0m ramp is used as an inclined plane to push a safe onto a truck platform that is 2.0m above the ground. If the safe weighs 1800N what force is needed to push it up the ramp? (450N)








  1. A certain set of pulleys enables the operator to lift a load weighing 1000.N by applying a 100.N force. How much rope must the operator pull in to make the load rise 3.0m? (30 m rope)



EKSAMEN I BØ300 BEDRIFTSØKONOMI II TID 09001400 DATO 12122007
ENG09001 INTRODUÇÃO À ENGENHARIA DE PRODUÇÃO CARGA HORÁRIA
青岛科技大学与美国休斯敦大学 维多利亚分校联合培养（1+1）硕士项目报名汇总表 编号 姓名 毕业大学名称 毕业证 学位证 个人签名 09001


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