AIPMT PRELIMS2001Physics-Work, Energy and Power
AIPMT PRELIMS 2001 Physics Simple Machines MCQ Question
Type: MCQ-numerical-Medium-Class 11
250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is lifted to 3m, the efficiency of pulley system will be:
A
25%
B
33.3%
C
75%
D
90%
Correct Answer
Option C
Detailed Explanation
Efficiency is calculated as (load distance/effort distance) × 100%. Here, efficiency = (3/12) × 100% = 25%.
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