A 960 kg car is pulling a 285 kg trailer. Together the car and trailer move forw

Question

A 960 kg car is pulling a 285 kg trailer. Together the car and trailer move forward with an acceleration of 2.13 m/s2. Ignore any frictional force of air drag on the car and all frictional forces on the trailer.

(a) Determine the net force on the car.

(b) Determine the net force on the trailer.

(c) Determine the force exerted by the trailer on the car.

(d) Determine the resultant force exerted by the car on the road. (Assume that the forward direction is along the +x-direction.)

Explanation / Answer

A) Force on car is the total force required to pull both car and trailer together at 2.13 m/s2

F = (285 + 960) 2.13 = 2651.85 N in forward direction.

B) Net force on the trailer is 285 x 2.13 = 607.05 N in forward direction.

C) The force exerted by the trailer on the car is 607.05 N in backward direction as all action has equal and opposite reaction.

D) The resultant force exerted by the car on the road = 2651.85 N in backward direction.

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