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ICSE Class 9 Answered

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Asked by dlakshmisrinivas | 07 Aug, 2021, 09:46: AM
answered-by-expert Expert Answer
Q.39 A train has a constant speed of 40 m/s on a level road against resistive force of magnitude 3×104  N. Find the power of the engine.
When the speed is constant there is zero acceleration. 
F = R 
P = Fv 
P = 3 x 104 x 40 
   = 1.2 x 106 W 
Thus, power of engine is 1.2 x 106 W 
Answered by Shiwani Sawant | 11 Aug, 2021, 01:02: PM
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