Question

Find the power of an engine which can maintain a
speed of 50 ms for a train of mass 3 * 10% kg on a
rough line. The coefficient of friction is 0.05. Take
g =
10 mg​

Answer 1

Answer:

Explanation:

Speed=50m/s,Mass=3×10  

6

kg

Coefficient=0.05,g=10m/s  

2

 

So, the frictional force act on it μN Where, N=mg

F=μmg=0.05×10×3×10  

6

=15×10  

5

N

Thus the power delivered  by thee train F×v=15×10  

5

N×50

=75×10  

6

J/s