Magnitude of Force Exerted on 1904kg Car by Road

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SUMMARY

The magnitude of the force exerted on a 1904kg car by the road, while pulling a 580.72kg trailer with an acceleration of 2.32m/s², is calculated using Newton's second law. The correct approach involves considering the total mass of the system, which is 1904kg + 580.72kg, resulting in a total mass of 2484.72kg. The force exerted by the road is therefore 2484.72kg multiplied by 2.32m/s², yielding a force of 5767.54N. Neglecting the trailer's mass leads to an incorrect calculation.

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A 1904kg car is pulling a 580.72kg trailer. Together the car and the trailer have an acceleration of 2.32m/s^2. Neglecting frictional forces acting on the trailer, find the magnitude of the force exterted on the car by the road.

My prof told me to just add the two masses and multiply them the acceleration. The answer was wrong. But since it's only asking about the force regarding the car, could we just neglect the trailer's mass? Wouldn't it just be 1904(2.32)?
 
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I am not a physicist but since trailer isn't self-powered it's just like a heavier car.
 
Nevermind, I figured it out. My prof was way off on this one. Heh.
 

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