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
c) the efficiency of the system.
Ans. A) 4.5. B) 5. C). 90%
Please provide the solution
Answers
Answered by
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A block and tackle system has 5 pulleys. (n = 5)
Effort = 1000 N
Load = 4500 N
(a) The mechanical advantage M.A = load/effort = 4500/1000 = 4.5
(b) The velocity ratio = n = 5
(c) The efficiency of the system η = M.A/V.R = 4.5/5 = 0.9 or 90%
Answered by
1
Answer:
The mechanical advantage, velocity ratio, and efficiency of the system are 4.5, 5, and 90%.
Explanation:
Given
Number of pulleys used=5
Effort applied(E)=1000N
Load lifted(L)=4500N
To find the mechanical advantage, the velocity ratio, and the efficiency of the system
Solution:
For a pulley system
V.R = 5
Using the formula of Mechanical Advantage
Then
Efficiency(η)=M.A/V.R Χ100%
=4.5×100/5
=90%
Therefore, the mechanical advantage is 4.5, the velocity ratio is 5 and the efficiency of the system is 90%.
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