38.According to Newton’s 1stLaw of motion, a movingobject acted on by a net force of zero, __________.a.Remains at restb. increases its inertiac. Decelerates at a constant rated. move at a constant rate__A__39.A hockey stick hits a puck on the ice. Identify an action-reaction pair.40.The statement by Newton that for every action there is an equal but opposite reaction is which of his laws of motion?41. What is the net force on the object pictured to the right ?42. What is the net acceleration on this object pictured to the right ?a. 0 m/s2b. 5 m/s2the right c. 10 m/s2to the right d. 20 m/s2to the right__C__43.The magnitude of the force of gravity acting on an object is called?44.A sled weighing 1.0 x 102N sits on level ground. What is the normal force of the slope acting on the sled? (Draw a FBD!!!!!)45.There are six books in a stack, and each book weighs 5 N. A constant force of 2.0 N causes the stack to move with constant velocity. What is the frictional force acting on the books?46.The moon revolves around the earth once every year. Which object experiences a great gravitational force?a. the moonb. the earthc. they are the samed. not enough information to tell __C__47.A set of physics textbooks weighs 294 N on earth, what would they weigh on a planet that has ½ the mass and ½ the radius of earth?25 N15 N0.5 kg20 N
48.After a cannon ball is fired into frictionless space, the amount of force needed to keep it moving equals ____.49.Equilibrium occurs when ____.