The velocity ratio of the machine is 0.19 and the work done on the load is 9000 N.
What is velocity of a simple machine?
The velocity ratio of simple machine is the ratio of distance travelled by the effort to the distance travelled by load in a machine.
efficiency = output work/input work x 100%
efficiency = Load x distance trav. by load / Effort x distance trav. by effort x 100%
75% = (4500 x 2) / (Eff x d) x 100%
0.75 = 9000 / (eff x d)
eff x d = 9000 / 0.75
eff x d = 12,000
V.R = distance traveled by effort / distance traveled by load
V.R = d/2
- Length of the inclined planed = 15 inches = 0.381 m
V.R = 0.381/2
V.R = 0.19
Work done on load
W = load x distance moved by load
W = 4500 x 2
W = 9000 N
Thus, the velocity ratio of the machine is 0.19 and the work done on the load is 9000 N.
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