1)a man uses a rope to haul a load of 750n up an wooden inclined...

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;
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.?

In Physics
1 Answers Available
Asked by young chibuzor kennedy on 12th June, 2019