Gr eater l ess equal 7 3points s e rcp 95p 036 a

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Unformatted text preview: 5.P .036. A bl ock of mass m = 5.60 kg i s r el eased f r om r est f r om poi nt and sl i des on the f r i cti onl ess tr ack shown i n the f i gur e bel ow. (Assume ha = 6.90 m.) (a) Deter mi ne the bl ock's speed at poi nts poi nt . m /s poi nt and m /s (b) Deter mi ne the net wor k done by the gr avi tati onal f or ce on the bl ock as i t moves f r om poi nt to poi nt . J www.we ba ssign.ne t/we b/Stude nt/Assignme nt- Re sponse s/submit? de p= 5935421 3/4 6/3/13 HW 9 8. –/2 points S e rCP 9 5.P .037. Tar zan swi ngs on a 33.0­m­l ong vi ne i ni ti al l y i ncl i ned at an angl e of 31.0° wi th the ver ti cal . (a) What i s hi s speed at the bottom of the swi ng i f he star ts f r om r est? m /s (b) What i s hi s speed at the bottom of the swi ng i f he pushes of f wi th a speed of 4.00 m/s? m /s 9. –/2 points S e rCP 9 5.P .050.WI . A ski er of mass 73 kg i s pul l ed up a sl ope by a motor ­dr i ven cabl e. (a) How much wor k i s r equi r ed to pul l hi m 85 m up a 30° sl ope (assumed f r i cti onl ess) at a constant speed of 2.6 m/s? J (b) What power (expr essed i n hp) must a motor have to per f or m thi s task? hp 10.–/1 points S e rCP 9 5.P .053. The el ectr i c motor of a model tr ai n accel er ates the tr ai n f r om r est to 0.540 m/s i n 15.0 ms. The total mass of the tr ai n i s 730 g. Fi nd the aver age power del i ver ed to the tr ai n dur i ng i ts accel er ati on. W www.we ba ssign.ne t/we b/Stude nt/Assignme nt- Re sponse s/submit? de p= 5935421 4/4...
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