1.) A pulley system of efficiency 80% is driven by a 250kg mass falling at a rate of 20m in 5.0s.It lifts a load of 1000kgf . Calculate (i)MA (ii)VR (iii) no of pulleys (iv) power input (v) power output(vi) height to which the load is raised in 5s ( g=10m/s2 ) 2.) An observer standing between 2 parallel cliffs emits an intense sound note. Two successive echoes are then heard after 5s and 7s .Calculate the distance between the cliffs (velocity of sound =340m/s)3.) A metre rod is balanced about a sharp knife edge placed at 0.6m mark. Two weights 0.02kg and 0.08kg suspended from 0.4m and 0.7m mark make the beam horizontal .Find the weight of the metre rod . (PLEASE CAN ANYONE HELP ME WITH ALL THESE SUMS )

1.) A pulley system of efficiency 80% is driven by a 250kg mass fallin

1.	1.) A pulley system of efficiency 80% is driven by a 250kg mass falling at a rate of 20m in 5.0s.It lifts a load of 1000kgf . Calculate (i)MA (ii)VR (iii) no of pulleys (iv) power input (v) power output(vi) height to which the load is raised in 5s ( g=10m/s2 ) 2.) An observer standing between 2 parallel cliffs emits an intense sound note. Two successive echoes are then heard after 5s and 7s .Calculate the distance between the cliffs (velocity of sound =340m/s)3.) A metre rod is balanced about a sharp knife edge placed at 0.6m mark. Two weights 0.02kg and 0.08kg suspended from 0.4m and 0.7m mark make the beam horizontal .Find the weight of the metre rod . (PLEASE CAN ANYONE HELP ME WITH ALL THESE SUMS )
Answer» TION:PLEASE MAKE me BRAIN LIST

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