1. Physics R/S Chapter 6: Momentum

2. Please select a Team 1. Team 1 2. Team 2 3. Team 3 4. Team 4 5. Team 5

3. Which of the following has the largest momentum? 1. a pickup truck speeding along a highway 2. a Mack truck parked in a parking lot 3. a dog running down the street 4. the school building

4. A heavy truck and a small car move at the same speed and stop with the same time interval, the force needed to stop the truck is 1. greater than the car. 2. smaller than the car. 3. equal to the car. 4. not enough info.

5. Jennifer is walking at 1.63 m/s. If Jennifer weighs 583 N, what is the magnitude of her momentum? 1. 137 kg m/s 2. 97.0 kg m/s 3. 68.6 kg m/s 4. 951 kg m/s

6. A 0.40 kg ball, initially at 8.5 m/s, is kicked so that it travels at 15.2 m/s in the opposite direction. What is the magnitude of the impulse on the ball? 1. 1.3 Ns 2. 2.7 Ns 3. 4.7 Ns 4. 9.5 Ns

7. A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's velocity? 1. 1.2 m/s 2. 3.2 m/s 3. 4.3 m/s 4. 6.3 m/s

8. Team Scores 4.6Team 4 4.2Team 2 4Team 1 4Team 3 3.8Team 5

9. The speed of a particle is doubled. By what factor is its momentum changed? 1. same. 2. quadruples. 3. half as much. 4. Twice as much.

10. A 0.42kg soccer ball is kicked with a velocity of 12 m/s. What is the ball's momentum? 1. 0.504 kgm/s 2. 5.04 kgm/s 3. 50.4 kgm/s 4. 5040 kgm/s

11. A 21kg child is riding a 5900g bike at a speed of 17m/s. What is the momentum of the bike? 1. 457.3 kgm/s 2. 357 kgm/s 3. 100.3 kgm/s 4. 121.3 kgm/s

12. A 0.145 kg baseball is thrown 24m/s to the left. If it rebounds with a speed of 35m/s to the right, what is the ball's change in momentum? 1. - 3.48 kgm/s. 2. + 5.08 kgm/s. 3. + 1.6 kgm/s. 4. + 8.56 kgm/s.

13. What are the units for impulse? 1. N/s 2. N s. 3. kgm 2 /s. 4. kgm/s 2

14. Team Scores 8.8Team 4 8.4Team 2 7.67Team 1 7.6Team 3 7.4Team 5

15. Two skaters at rest push against each other so that they move in opposite directions. What is their total momentum once they begin moving? 1. 1 kgm/s 2. -1 kgm/s 3. 0 kgm/s 4. Not enough info

16. An 1850kg van, at rest, is struck by a 975kg car. If the car was moving at +22m/s before the collision, what is the velocity of the “entangled” mass after the collision? 1. 5.79 m/s 2. 9.57 m/s 3. 7.59 m/s 4. 22.0 m/s

17. A 76kg person in a 45kg boat, both at rest, jumps out of the boat with a velocity of +2.5m/s. What is the velocity of the boat? 1. 1.48 m/s 2. -1.48 m/s 3. + 4.2 m/s 4. - 4.2 m/s

18. A 10g marble (32cm/s, east) collides with a 25g marble (15cm/s, west). If the smaller marble moves at 45cm/s, west after colliding, what is the velocity of the larger marble? 1. 9.8 cm/s 2. 12.3 cm/s 3. 15.8 cm/s 4. 107.0 cm/s

19. A 0.25kg ball moving at 16m/s is slowed to a stop by a -30N force. How far does the ball travel before stopping? 1. 0.13 m 2. 2.08 m 3. 1.04 m 4. 64.0 m

20. Team Scores 13.6Team 4 12Team 3 12Team 2 11Team 5 10.97Team 1

21. How do airbags help in automobile accidents? 1. Time ↑, Force ↑ 2. Time ↓, Force ↓ 3. Time ↑, Force ↓ 4. Time ↓, Force ↑

22. A 1400kg car moving west at 15m/s is brought to rest in 0.30s. What is the magnitude and direction of the force exerted on the car? 1. 21000 N 2. 70000 N 3. -70000 N 4. -21000 N

23. A rocket's engine exerts a force of 1000N for 2.5s. What is the rocket's change in momentum? 1. 1000 kgm/s 2. 2500 kgm/s 3. 2.5 kgm/s 4. Not enough info

24. A 70kg passenger is involved in a 17.9m/s crash. If the stopping time was 100ms, what force did he experience? 1. -12530 N 2. 12530 N 3. -12.53 N 4. 12.53 N

25. What is the name given to a collision in which objects collide and stick together? 1. Elastic collision 2. Inelastic collision 3. Conservative collision 4. Kinetic collision

26. Team Scores 16.8Team 4 15.6Team 3 15.4Team 2 14.4Team 5 14.37Team 1

27. Team MVP PointsTeamParticipant 19Team 4Manas 18Team 3Naman 16Team 2Sourya 18Team 5Karolina 16Team 1Kimberly