A system of pulleys is used to lift a load of 1000 kg wt. If the velocity ratio efficiencies and the efficiency are and respectively, then the effort required to lift the load is ____ N
Step 1: Given data
Load=
Efficiency =
Velocity ratio = 20
Effort=?
Step 2: Calculations
Efficiency is given by the equation
Where mechanical advantage is defined as the ratio of load to the effort.
Converting to Newton,
Which is nearly equal to N
Hence, option(d) is correct