A 13.5 kg box over a rough patch 1.75 m long on horizontal force. Just before entering the rough patch, the speed of the box was 2.25 m/s, and just after leaving it, the speed of the box was 1.20 m/s. The magnitude of the average force that friction on the rough patch exerts on the box is closes to:
A) 13.7 N
B) 19.5 N
C) 14.0 N
D) 5.55 N
E) It is impossible to know since we are not given the coefficient of kinetic friction.
A) 13.7 N
B) 19.5 N
C) 14.0 N
D) 5.55 N
E) It is impossible to know since we are not given the coefficient of kinetic friction.