A train consisting of two cars pulled by a locomotive experiences an acceleration of 0.33m/s^2 [fwd]. Friction is negligible. Each car has a mass of 3.1 * 10^4 KG.
a. ) Determine the force exerted by the first car on the second car.
b. ) Determine the force exerted by the locomotive on the first car.
Applying newtons third law of motion which states:
for every action force, there is a simultaneous force equal in magnitude, but opposite in direction
The Attempt at a Solution
I drew a FBD of the situation and solved for part a) by simply applying newtons second law equation [ F= mA ]
I solved for F and got 1.0 * 10^4 N.
However I have trouble solving for part b.)
The answer is supposed to be 2.0 * 10^4 N, but I can't get it.
Would appreciate any help/advice!
Many thanks in advance.