ICSE Class 10 Physics 2020 Solved Paper

Question : 9

Total: 67

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 crane ' A ' to that of crane ' B '.

Solution:

‌

‌ Power of crane A ‌

‌ Power of crane ‌B

=‌

‌

‌ Work done by crane A ‌

‌ Time taken by A ‌

‌ Work done by crane B ‌

‌ Time taken by B ‌

‌=‌

‌ Work done by A ‌

‌ Work done by B ‌

×‌

‌ Time taken by B ‌

‌ Time taken by A ‌

‌=‌

×‌

2 sec

5 sec

‌=2:5

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