1)a man uses a rope to haul a load of 750n up an wooden inclined plane of effective length 4.50m,1.5m high,the fractional force between the plane and the is 200n.find the;

Question

A)effort required to move to haul up the plane.
B)volocity ratio
C)useful work done on the plane.
2) a four pulley system with a continous rope round it.supports a load of 600n.the efficiency of the system is 75%,if an effort raises the steadily throung a vertical distance of 2m.
Calculate;
a) effort
B) workdone by the effort
C)work wasted.
3) a screw jack whose pitch is 2mm is used to raise a car of mass 900kg throung a height of 20cm.the length of the tommy bar of the jack is 40cm,if the jack is 60% efficient.
Calculate the;
A) volocity ratio
B)mechanical advantage of the jack
C)effort required
D)workdone by the effort.take g=10m,pi=22/7.
4) an inclined plane of an angle 30 is used to raise a load of 4500n through a height of 2m.if the plane is 75% efficient.
Calculate the;
A)mechanical advantage
B)volocity ratio
C) workdone by the effort.?

Answer 1

I already took the course and do not need practice. Please let us see your attempts so we know where you got stuck.
(Velocity by the way, and if you just pull it with a single rope and no pulleys,it moves just as fast as you do. )

Answer 2

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