3. Force 0 Time The graph above shows the force acting on an object as a function of time. The change in momentum of the object from time 0 to f is (A) 2F1 (B) F (C) -Ft (D) -Ft (E) zero4. The force F exerted on a ball during a collision with a wall is given as a function of time / by the equation F(t) = of - Air , where a = 400 N/s and / = 4000 N's . The ball first contacts the wall at / =0, and the collision lasts for 0.10 s. What is the magnitude of the change in momentum of the ball? (A) 0 (B) 0.67 kg-m/'s (C) 3.33 kg-m/s (D) 3.60 kg.m/'s (E) The change in momentum of the ball cannot be determined without knowing the mass of the ball. 5. Force (N) 10 0 Time (s) 2 4 -10 The graph above shows the force on an object of mass M as a function of time. For the time interval 0 to 4 s, the total change in the momentum of the object is (A) 40 kg-m/'s (B) 20 kg-m/'s (C) 0 kg-m/'s (D) -20 kg m/'s (E) indeterminable unless the mass M of the object is known6. For an impulse-momentum experiment, students collect data on a collision between blocks A and B. A force probe attached to block A is used to measure the force exerted by block A on block B as a function of time during the collision. The data collected shows a positive force that is used to determine the impulse on block B. The force sensor is removed from block A and attached to block B, and the experiment is run again. Which of the following correctly describes how this affects the data and if the impulse on block B can still be determined? (A) The data can only be used to determine the impulse on block A, not block B. (B) The data can only be used to determine the impulse on block B, not block A. (C) The data cannot be used to determine the impulse on block A or block B. (D) The data can be used to determine the impulse on block B and block A. (E) The data can be used to determine the force on block B.Before Collision Object 1 Object 2 O V1i V 21 O After Collision Object 1 Object 2 Vif O O V 2f In an experiment, students use motion sensors to measure the speed of objects 1 and 2, of masses m, and ma, respectively, that collide head-on while moving along a smooth horizontal surface, Consider velocity to the right to be positive. All motion is along a straight line. The speeds of object 1 are V1; before the collision and vy after the collision. The speeds of object 2 are vey before the collision and vay after the collision. Before the collisions, object 1 is moving to the right and and object 2 is moving to the left. Both objects reverse their direction of motion during the collision, as shown. 7. Which of the following expressions can be used to determine the magnitude of the impulse on object 1? (A) my(vey - vai) (B) mi(w/ - vy) (C) my(v1/ - vli) (D) (my+ ma)