28/03/2020Dynamics – Momentum and Circular Motion(Senior Class Physics Study by Topics) 0Comments by Gate Academy 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. Elastic Joint Individual Inelastic2. Which of the following variables was assumed constant in both parts of the momentum lab where moving marbles moved an inverted plastic cup Velocity of the marbles. Mass of the marbles. Friction between the cup and the table Momentum of all the marbles.3. Read the following statement :"If no net force or net impulse acts on a system, the momentum of that system cannot change." What does it refer to? Law of Impulse Newton's 3rd Law Law of Conservation of Momentum Law of Momentum4. A 50 kg skateboarder is riding his 2.3 kg skateboard at a speed of 4 m/s.What is his momentum? In between 100 and 200 kg m/s None of the above Greater than 200 kg m/s Less than 100 kg m/s5. The unit for the quantity "MOMENTUM" is __________ in the metric system. Kg m/s/s/s Kg m Kg m/s/s Kg m/s6. What one characteristics of a bullet gives it its large momentumwhen fired from a hand-gun? Velocity Inertia Mass Shape7. A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair Was greatest while the person sat in the chair. Was zero while stationary and increased when the person stood. Remained the same. Was zero when the person got out of the chair and increased while the person sat.8. What type of collision occurs when the objects bounce off of each other after making contact? Elastic collision Inelastic collision Rebound collision Sticky collision9. In a perfectly inelastic collision, a ball dropped from a certain height would bounce Would stick to the floor At the same height At a greater height At a lesser height10. What impulse occurs when an average force of 15 N is exerted on a cart for 3.0 s? 50 N.s 45 N.s 55 N.s 40 N.s11. Because of the principle of conservation of momentum, a rocket can get rid of its empty stages To increase mass To maintain velocity To decrease velocity To increase velocity12. 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. 30,000 N 35,000N 56,000N 5,600 N13. 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: Moves along with the red ball at half "v". Bounces back. Moves along with the red ball at "v". Stops.14. Which of the following is a way to decrease momentum? Increase impulse Increase friction Increase force Increase velocity15. A 75 kg person walking around a corner bumped into an 80 kg person who was running around the same corner. The momentum of the 80 kg person Increased. Remained the same. Was conserved Decreased.16. Why is falling on a floor with more give less dangerous than falling on a floor with less give? A greater time for a change in momentum results in less force. Because falling on a floor with less give comprises shorter time. Because falling on a floor with more give causes less impact. Because falling on a floor with more give includes greater momentum. Because the floor with more give allows a greater time for the impulse that reduces the momentum of fall to zero.17. Which of these marbles would have the greatest momentum assumingthey all travel at the same velocity? 6.2 gram white marble 4.3 grams blue marble 2.3 gram clear marble 4.8 grams red marble18. In a two-body collision, Kinetic energy is always conserved. Momentum is always conserved. Neither momentum nor kinetic energy is conserved. Both momentum and kinetic energy are always conserved19. How can the momentum of a moving object be increased? Decelerate the object until it stops. Decrease the object's velocity. Increase the mass of the object. Decrease the mass of the object.20. The measure of how difficult it is to stop a moving object is known as the object's ______ Velocity Momentum Inertia Mass21. 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? 15 kg 1.5 kg 3 kg 54 kg22. What is true about impulse and momentum Momentum is the mass of a substance multiplied by the velocity while impulse is just the change of momentum Momentum and impulse are unrelated to each other Impulse is mass times velocity while momentum is force times time Impulse deals with velocity while momentum deals with change in velocity23. How can defined change in momentum Force*change in time Mass*velocity Impulse All of the above24. If your dog pulls the rope with 15 N force to the right and you pull the rope 5 N force to the left. What is the force and direction in Newtons of the final motion? 10 Newtons to the left 15 Newtons to the right 15 Newtons to the left 10 Newtons to the right25. Which of the following objects have the least momentum? 5 Kg rock not moving 4 kg rock falling at 2 m/s 3 Kg rock falling at 10 m/s 2 kg rock falling at 3 m/s.26 out of 25Time is Up!