Answer:
M.A = 7.67
Efficiency = 795.64%
Explanation:
Applying,
M.A = L/E............... Equation 1
Where M.A = Machanical Advantage, L = Load, E = Effort.
From the question,
Given: L = 230 N, E = 30 N
Substitute these values into equation 1
M.A = 230/30
M.A = 7.67
Also Applying
E = (M.A/V.R)×100............... Equation 2
Where E = Efficiency, M.A = Machanical Advantage, V.R = Velocity ratio
But,
V.R = R/r.............. Equation 3
Where R = radius of the wheel r = radius of the axle
From the question,
Given: R = 0.8 m r = 0.83 m
Substitute these values into equation 3
V.R = 0.8/0.83
V.R = 0.964
Substitute these values into equation 2
E = (7.67/0.964)×100
E = 795.64%
