ICSE Class 10 Physics 2016 Solved Paper

A boy weighing 40‌kg climbs up a stair of 30 steps each 20‌cm high in 4 minute and a girl weighing 30‌kg does the same in 3 minutes. Compare:

Question : 4

Total: 73

The power developed by them.

Solution:

Comparing power developed by them:

Power developed by boy

Power developed by girl

Work done by boy/time taken to climbs up the stairs in seconds

Work done by girl/time taken to climbs up the stairs in seconds

‌=‌

‌

2400

4×60

1800

3×60

=‌

2400

4×60

×‌

3×60

1800

‌=1:1

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