1 42) A passenger car collided with a barrier of sand - filled barrels. During this collision the change in momentum for the car was - 6.5 x 105 N-s which occurred over a time of 0.095 s. What force was exerted on the front of the car during this time interval? A. -6.8 x 103 N B. -6.2 x 104 N C. -6.2 x 105 N D. -6.8 x 106 N 43) A ball of putty with a mass of 0.560 kg is directly thrown toward a nearby wall with a velocity of + 9.30 m/s. The putty sticks to the wall. What is the impulse on the putty as it comes to a stop? A. -16.6 N's B. + 16.6 N.s C. + 5.21 N's D. -5.21 N.s 1 44) Which statement correctly expresses Newton's Third Law of Motion? A. an object will accelerate in the direction of the net force on the object. B. without a net force, an object in motion will tend to maintain its velocity and an object at rest will tend to remain at rest. C. whenever one object exerts a force on a second object, the second object exerts an equal but opposite force on the first object. D. none of the above Numeric Response 45) A 45.0 kg girl pedals a bike at a speed of 2.50 m/s. What is the kinetic energy of the girl? 1 x 102 J