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Answer on Mechanics | Relativity Question for Rooky

Question #889
A 6 kg cart on a level surface is pulled at a constant velocity of 2 m/sec by a constant force of 10 N. What is the acceleration? What is the friction force opposing the motion?

show work (so i know how to do it) and answer please
Expert's answer
As the car is pulled at a constant velocity, the acceleration and vector sum of the forces acting on the car equals to zero.
Thus a = 0;

F - Ffrict = 0;
Ffrict = 10 N.

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