11. Problem on force and acceleration (Second law of motion)

An 7000 $kg$ engine pulls a train of 6 $wagons$, each of 2500 $kg$, along a horizontal track. If the engine exerts a force of 80000 $N$ and the track offers a friction force of 5000 $N$, then calculate:

 

(a) the net accelerating force and

 

(b) the acceleration of the train

 

Note: Enter your answers with two decimal digits.

 

(a) Net accelerating force $=$  $N$

 

(b) Acceleration of the train $=$  $m{s}^{-2}$