A crane 'A' lifts a heavy load in 5 seconds, ...

ICSE Class 10 Physics 2020 Paper

Question : 9 of 67

Marks: +1, -0

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:

\frac{\text{ Power of crane A }}{\text{ Power of crane } B} = \frac{ \frac{\text{ Work done by crane A }}{\text{ Time taken by A }} }{ \frac{\text{ Work done by crane B }}{\text{ Time taken by B }} }

= \frac{\text{ Work done by A }}{\text{ Work done by B }} \times \frac{\text{ Time taken by B }}{\text{ Time taken by A }}

= \frac{1}{1} \times \frac{2\ \text{sec}}{5\ \text{sec}}

= 2:5

Go to Question:

Prev Question

Next Question