An 8-Kg Mass Is Pulled Across a Smooth Floor Using

Multiple Choice

An 8-kg mass is pulled across a smooth floor using a rope. The rope makes an angle of 28° with the floor. If the tension in the rope is 45 N, the normal force exerted by the floor on the mass is

A) 57 N.
B) 65 N.
C) 78 N.
D) 69 N.