5) THIRD LAW PROBLEM: LINKED OBJECTS A train locomotive pulls three boxcars (each of mass 2.5 x 10 kg ) with an applied force of 5.0 x 10 N forward. There is a frictional force of 450 N on each boxcar. Find: a) The acceleration of the train. b) The force exerted by the second boxcar on the third boxcar. c) The force exerted by the first boxcar on the second boxcar. (Ans: a) 0.65 m/s² b) 1.7 x 10ª N, c) 3.3 x 10* N) 21

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: