28/03/2020 Dynamics – Momentum and Circular Motion(Senior Class Physics Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Dynamics - Momentum and Circular Motion(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. What is the momentum of a 15-kg rock rolling at 3 m/s? 18 kg m/s 45 kg m/s 5 kg m/s 0 kg m/s 2. The measure of how difficult it is to stop a moving object is known as the object's ______ Momentum Velocity Inertia Mass 3. 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 4. What impulse occurs when an average force of 15 N is exerted on a cart for 3.0 s? 40 N.s 55 N.s 50 N.s 45 N.s 5. 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 kg 6. Which of the following is a way to decrease momentum? Increase friction Increase velocity Increase impulse Increase force 7. In a perfectly inelastic collision, a ball dropped from a certain height would bounce At a greater height Would stick to the floor At the same height At a lesser height 8. 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 zero when the person got out of the chair and increased while the person sat. Was zero while stationary and increased when the person stood. Remained the same. Was greatest while the person sat in the chair. 9. 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. Momentum of all the marbles. Mass of the marbles. Friction between the cup and the table 10. In the marble-cup momentum lab, the "distance the cup moved" was an indirect measurement for the marble's.... Acceleration Velocity Momentum Speed 11. When comparing the momentum of two moving objects, which of the following is correct? The more massive object will have less momentum if its velocity is greater. The less massive object will have less momentum if the velocities are the same. The object with the higher velocity will have less momentum if the masses are equal. The more massive object will have less momentum if the velocities are the same. 12. What type of collision occurs when the objects bounce off of each other after making contact? Elastic collision Rebound collision Sticky collision Inelastic collision 13. Momentum has Force and Velocity Direction only Magnitude and direction Magnitude only 14. What one characteristics of a bullet gives it its large momentumwhen fired from a hand-gun? Shape Inertia Mass Velocity 15. Two swimmers relax close together on air mattresses in a pool. One swimmer's mass is 48 kg, and the other's mass is 55 kg. If the swimmers push away from each other, Their total momentum decreases. Their momenta are equal but opposite. Their total momentum doubles. Their total momentum triples. 16. 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 Was conserved Remained the same. Decreased. Increased. 17. In a perfectly elastic collision, a ball dropped from a certain height would bounce At a lesser height At a greater height Would stick to the floor At the same height 18. The momentum of a body is equal to its mass multiplied by its velocity. False True 19. A 50 kg Corvette (car) has a momentum of 500 kg m/s. How fast is the car going? 70 m/s 10 m/s 250 m/s 25,000 m/s 20. Because of the principle of conservation of momentum, a rocket can get rid of its empty stages To decrease velocity To maintain velocity To increase mass To increase velocity 21. How can defined change in momentum Force*change in time All of the above Mass*velocity Impulse 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 Different velocities Velocity of the first object is greater than another Both velocity's is same Different direction and different velocities 23. Which of the following is the correct formula for calculating momentum of moving objects? P = mV P = m/V P = m-V P = m + V 24. Momentum means or is most associated with: Inertia Inertia in Motion Impulse Newton's second Law 25. 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 10 Newtons to the right 15 Newtons to the left 1 out of 25 Time is Up! Time's up