Friction Force with Known Acceleration · PhysicsBowl 2011 #15

Physics · mechanics

Problem

4.0

kg object is pushed to the right on a rough surface by a horizontal force of

15

N as shown. During the push, the object accelerates uniformly to the right at

2.50

m/s². What must be the magnitude of the force of friction also acting on the object during the push? (A) 0 N (B) 5 N (C) 10 N (D) 15 N (E) 25 N