Q- An object of mass 5.00 kg, attached to a spring scale, rests on a frictionless, horizontal surface. The spring scale attached to the rear of a boxcar, has constant reading of 18.0 N when the car is in motion.
(a) Determine the acceleration of the car.
(b) What constant reading will the spring scale show if the car moves with constant velocity?
(c) Describe the forces on the object as observed by someone in the car and by someone outside at rest outside the car.
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