ICSE Class 10 Physics 2016 Solved Paper

Question : 34

Total: 73

A pulley system has three pulleys. A load of 120N is overcome by applying an effort of 50N. Calculate the Mechanical Advantage and Efficiency of this system.

Solution:

Given : E=50N,L=120N,V.R=3
(No. of pulleys in system).
‌ M.A. ‌=‌

‌ Load ‌

‌ Effort ‌

=‌

120

=2.4‌ Ans. ‌
‌ Efficiency ‌‌=‌

‌ Mechanical Advantage ‌

‌ Velocity Ratio ‌

×100%
‌=‌

2.4

×100=‌

240

‌=80%.

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