Question

a block and tackle system has velocity ratio 4 . if a load of 200N is raised by using a force of 75N
Find:
1)Mechanical advantage of the system
2)Efficiency of the system
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Answer 1

Answer:

The velocity ratio of a tackle is the ratio between the velocity of the hauling line to that of the hauled load. A line with a mechanical advantage of 4 has a velocity ratio of 4:1. In other words, to raise a load at 1 metre per second, the hauling part of the rope must be pulled at 4 metres per second.