Welcome to your Dynamics - Momentum and Circular Motion(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. When objects become tangled or stick together it is called an ________collision. Individual Elastic Inelastic Joint 2. A bat exerts a horizontal force on a 0.145-kg ball ofF(t) = [1.6t - 6t^2] between t = 0 and t = 2.50 sCalculate the impulse exerted by the bat on the ball at t=2.50s. 0N.s 33.5N.s -33.5N.s -26.25N.s 3. In a perfectly inelastic collision, a ball dropped from a certain height would bounce At a greater height At the same height Would stick to the floor At a lesser height 4. The momentum of a body is equal to its mass multiplied by its velocity. False True 5. A 0.2 kg red cue ball rolling at 1.4 m/s elastically collides directly with a 0.2 kg 9-Ball at rest.Which of the following is true? The red cue ball would have a velocity of 0 m/s The red cue ball would have a velocity greater than 1.0 m/s The 9-ball would have a velocity greater than 2 m/s The 9-ball would have a velocity greater than 0.5 m/s but less than 2m/s 6. Which of the following variables was assumed constant in both parts of the momentum lab where moving marbles moved an inverted plastic cup Friction between the cup and the table Mass of the marbles. Velocity of the marbles. Momentum of all the marbles. 7. Elastic collision is None of the above Objects that collide and decrease their velocity Objects that collide and bounce off of each other Objects that collide and stick together 8. What could be the momentum of a 1,300-kg car that moves at 4 m/s? 52 N 5,200 N 52 kg.m/s 5,200 kg.m/s 9. A 10 kg body moving with 33m/s and the another body is moving with 55m/s with mass 2kg both body's collide with one other this is an completely inelastic collision. what is the final velocity after the collision 4m/s 12.6m/s 27.5m/s 5.6m/s 10. Why is falling on a floor with more give less dangerous than falling on a floor with less give? Because falling on a floor with more give causes less impact. Because falling on a floor with more give includes greater momentum. Because falling on a floor with less give comprises shorter time. Because the floor with more give allows a greater time for the impulse that reduces the momentum of fall to zero. A greater time for a change in momentum results in less force. 11. Which of the following is the correct formula for calculating momentum of moving objects? P = m/V P = mV P = m + V P = m-V 12. A 71.25 kilogram motorcycle is moving at a speed of 33.75 m/s. What is the momentum of the cycle? None of the above Greater than 200 kg m/s Equal to 200 kg m/s Less than 200 kg m/s 13. What one characteristics of a bullet gives it its large momentumwhen fired from a hand-gun? Shape Mass Velocity Inertia 14. In a perfectly elastic collision, a ball dropped from a certain height would bounce At a lesser height Would stick to the floor At the same height At a greater height 15. What is true about impulse and momentum Momentum and impulse are unrelated to each other Impulse deals with velocity while momentum deals with change in velocity Momentum is the mass of a substance multiplied by the velocity while impulse is just the change of momentum Impulse is mass times velocity while momentum is force times time 16. Which of the following objects have the least momentum? 2 kg rock falling at 3 m/s. 3 Kg rock falling at 10 m/s 4 kg rock falling at 2 m/s 5 Kg rock not moving 17. Which of the following is a way to decrease momentum? Increase velocity Increase force Increase impulse Increase friction 18. What is the average force that a gun exerts on a bullet shot with an impulse of 14,000 N.s? Assume it took 0.4 s for the bullet to leave the barrel. 35,000N 56,000N 30,000 N 5,600 N 19. During a car collisiion the mometum of all moving object is changed. The change was in the speed of the moving objects. All moving objects (cars) came to rest. Which of these impulses would result in least injury to the vehicle passengers? When a very large force is applied for a very short period of time. When a large Force is applied for a long period of time. When a small force is applied for a very short time. When a small force is applied over a long period of time 20. Momentum means or is most associated with: Inertia Inertia in Motion Impulse Newton's second Law 21. Which of these marbles would have the greatest momentum assumingthey all travel at the same velocity? 4.8 grams red marble 4.3 grams blue marble 6.2 gram white marble 2.3 gram clear marble 22. The mass 'm' of the object is moving with a straight line motion and another object is mass equal to the first object and it is moving along the same direction. after collision what is the speed of the both objects Velocity of the first object is greater than another Both velocity's is same Different velocities Different direction and different velocities 23. A bowling ball has 9 kg m/s of momentum when it is rolled 6 m/s. What is the mass of the bowling ball? 1.5 kg 54 kg 15 kg 3 kg 24. A blue billiard ball is moving at speed "v" towards a red ball of the same mass standing still. Assuming it is an elastic collision, after hitting the red ball, the blue one: Bounces back. Stops. Moves along with the red ball at "v". Moves along with the red ball at half "v". 25. A 50 kg skateboarder is riding his 2.3 kg skateboard at a speed of 4 m/s.What is his momentum? Less than 100 kg m/s None of the above Greater than 200 kg m/s In between 100 and 200 kg m/s 1 out of 25 Time is Up! Time's up
