ICSE Class 10 Physics 2017 Solved Paper

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Question : 4
Total: 65
If the power of a motor be 100KW, at what speed can it raise a load of 50,000N ?
Solution:  
Given : Power =100kW=100×1000=105W.
Load (or Force) =50,000N, Speed = ?
We know,
Power = Force × Average Speed
Average speed =
Power
Force
=
105
50,000

=2ms1
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