A 500-N Box Is Sliding on a Rough Horizontal Floor, and and the Only

question 28

Multiple Choice

A 50.0-N box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. You observe that at one instant the box is sliding to the right at 1.75 m/s and that it stops in 2.25 s with uniform acceleration. What magnitude force does friction exert on this box?

• A) 3.97 N
• B) 8.93 N
• C) 38.9 N
• D) 50.0 N
• E) 490 N