A 6.483E+3-kg truck moving east at 15.8 m/s collides with a 1.298E+3-kg car moving west at 28.6 m/s. The collision takes place over a time interval of 0.221 s. The car and the truck stick together after the collision. Find the force (in N) of the car on the truck during the collision. Call this force positive if it points to the east, and negative if it points to the west.

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