Short answerEasy1 mark
6(iii)(b)
Given are two pulleys. If Load = 48 kgf and efficiency is 80% then calculate :

Mechanical Advantage.
Topic: Efficiency and mechanical advantage
Question wording verified against source paper
Answer
Exam answer
1.6.
Explanation
Efficiency = MA/VR. Therefore 0.80 = MA/2, so MA = 1.6.
More from Machines
The Velocity Ratio (VR) of a block and tackle system of two pulleys with the effort in the upward direction is:
(a) 1
(b) 2
(c) 3
(d) 42026In which case (1st or 2nd) was the potato closer to her hand applying the effort? (Assume normal reaction of the surface of the potato is same in both cases)2026Give a reason for your answer in (a) above.2026To which class of lever does a pair of scissors belong?2026the efforts in the two cases.2026the potential energy gained by the loads in the two cases.2026