Physics
A block and tackle system has 5 pulleys. If an effort of 1000 N is needed in the downward direction to raise a load of 4500 N,
Calculate —
(a)The mechanical advantage,
(b)The velocity ratio and,
(c)The efficiency of the system.
Machines
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Answer
Given,
Effort = 1000 N
Load = 4500 N
Number of pulleys = n = 5
As we know that,
Substituting the values in the formula we get,
As we know,
V.R. = n = 5
Therefore, efficiency = 90%
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