Question 1
A 4.0-kg block slides down a 35° incline at a constant speed when a 16-N force is applied acting up and parallel to the incline. What is the coefficient of kinetic friction between the block and the surface of the incline?
◦ 0.20
◦ 0.23
◦ 0.26
◦ 0.33
◦ 0.41
Question 2
A 5.0-kg mass is attached to the ceiling of an elevator by a rope whose mass is negligible. What force does the mass exert on the rope when the elevator has an acceleration of 4.0 m/s2 upward?
◦ 69 N downward
◦ 29 N downward
◦ 49 N downward
◦ 20 N downward
◦ 19 N downward