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A) NOne lestThe 300 N crate slides down the inclined curved path from A to B in the vertical plane as shown in the figure.If the crate has a velocity of 1.2 m/s down the inclined at point A and 8 m/s at B. Find the work done againstfriction during the motion.N22.ol6 m(1) 860 N m(3) 1200 N m(2) 987 N m(4) 500 N m |
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Answer» from work energy theoram (Work done)P.E -Wf = change in K.E => 300*6 - Wf = 1/2*(30)*(8²-1.2²) = 15*(62.56) => Wf = 1800 -938.4=> wf = 861Nm option 1 |
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