Part A: Short Answer Questions (A) Are the normal force and the force of gravity on an object on a surface always equal in magnitude? Explain. [_/3] (A) When drawing free-body diagrams, does the label "centripetal force\" get used? Explain why or why not. [ _/2] (A) A father is pulling his child on a sled in the snow. According to Newton's Third Law, the force the father exerts on the sled is equal to the force the sled exerts on the father but opposite in direction. How is it possible that the father can pull the child and sled forward? U3]