Short answerEasy2 marks
A crane 'A' lifts a heavy load in 5 seconds, whereas another crane 'B' does the same work in 2 seconds. Compare the power of n crane 'A' to that of crane 'B'.
Topic: Machines, levers and pulleys
Previous-year question practice database
Answer
Exam answer
2 : 5.
Explanation
Both cranes do the same work; power is inversely proportional to time: PA:PB = 1/5 : 1/2 = 2:5.
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