1. The impulse-momentum theorem states that A. the impulse on an object is equal to the change in momentum it causes B. the impulse on an object is less than the change in momentum it causes C. the impulse on an object is greater than the change in momentum it causes D. the force on a moving object is equal to the magnitude of the impulse 2. Catching the bal without moving the hands and catching it with hands moving backward. What relationship exists between impact force and duration of time? A The longer the time the longer the impact force B. The lesser the time the longer the impact force C. The lesser the time the lesser the impact force D. The longer the time the lesser the impact force 3. The Law of Conservation of Momentum states: A. The total momentum before a collision is less than the total momentum after a collision. B. The total momentum before a collision is greater than the total momentum after a collision. C. The total momentum before a collision is equal to the total momentum after a collision. D. The total momentum before a collision is not related to the total momentum after a collision. 4. F, is the force that m, exerts on m, during collision, and F, is the force that m, exerts on m, during collision. Additionally, the two forces m, and m, act over the same time interval, At Before collision After collision m A The impulse on m, is equal to and opposite the impulse on m,. B. The impulse on m, is greater than equal to and the same direction the impulse on m, C. The impulse on m, is not equal to and opposite the impulse on m,. D. The imnulse on m, is greater than equal to and the same direction the imnulse onm.

What is the magnitude of the angular momentum of the 2.40 kgkg , 4.20-cm-diameter rotating disk in the figure (Figure 1)?

A block of mass m= 5.00 kg is reased from point A and slides dows the frictionless track shown in the figure. calculate the speed of the block at piont B and C. g= 9.8m/s2

A brick stands on the ground vertically, as shown. A ball made of clay with mass m is thrown with velocity v at the brick and sticks to it. Another ball made of aluminum but with the same mass m is also thrown with the same velocity v at the brick but instead bounces off of it. Which ball is more likely to knock the brick over? a. Not enough information. b. the clay ball c. the aluminum ball d. Both balls are equally likely to knock over the brick.

SC 24: Module 4 Assignment Booklet 48 For questions 17 to 21, read each question carefully. Decide which of the choices BEST answers the question. Place your answer in the blank space given. 17. Two vehicles with the same mass and travelling the same speed in opposite directions hit head on. What is the total momentum immediately after the collision? A. zero B. double that of each car C. one half that of each car D. four tirnes that of each car Use the following diagram to answer questions 18 and 19. Car B Car A nt Bookl ence 24

18. If car A has a greater momentum than car B, what will happen to both vehicles immediately after they collide? A. They will travel to the right. B. They will travel to the left. C. They will stop immediately. D. It cannot be determined from this information. 19. If both cars are travelling the same speed and car B has a greater mass, what will happen to both vehicles after they collide? A. They will travel to the right. B. They will travel to the left. C. They will stop immediately. D. It cannot be determined from this information.

Match the following behavior with the physics concept it illustrates          -           A.           B.           C.           D.           E.       Acceleration of a rocket at launch          -           A.           B.           C.           D.           E.       Rebound of a basketball off the backboard          -           A.           B.           C.           D.           E.       Occupant protection in an automobile crash          -           A.           B.           C.           D.           E.       Proportional to velocity          -           A.           B.           C.           D.           E.       Proportional to square of velocity A. Conservation of momentum and thrust B. Elastic collision C. Inelastic collision D. Energy E. Momentum

A- Using the equation f=mv/t and the example problem given in the leture answer the following problem. A kick-ball of mass 0.5 kilograms is moving at 4 meters/second after being kicked. The kick lasted 2 seconds. How much force was used to kick the ball?_____newton. B- Ft=mv. impulse = momentum. Due to this formula gymniats practice on thick mats. The mats increase the time that it takes for the gymnast to come to a stop. Thus decreasing the forces acting on the gymnast. (True or False)