physics

Asked by dlakshmisrinivas | 7th Aug, 2021, 09:46: AM

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. 
Thus, 
F = R 
Here, 
Thus, 
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 | 11th Aug, 2021, 01:02: PM

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