A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio.
a
0.53
b
0.83
c
1.20
d
1.50
e
1.88
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johnteju
6 years ago
Efficiency=Mechanical advantage(M.A) / velocity ratio(V.R)
M.A=Load/Effort
=6/4
M.A =1.5
Efficiency=80%
80/100=1.5/V.R
V.R=150/80
V.R=1.875
