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- 1. Multiple ChoiceThe law of conservation of momentum states that,p before is less than p afterp before is the same as p afterp before is more than p after
- 2. Multiple ChoiceA 0.250 kg cart moving at 0.400 m/s has how much momentum?0.1 kg-m/s1 kg-m/s10 kg-m/s100 kg-m/s
- 3. Multiple ChoiceIf 2 objects collide and stick together, what will happen to their velocities?velocities will increasevelocities will decreasevelocities will stay the samenone of the above
- 4. Multiple ChoiceA 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?0 kgm/s30 kgm/s50 kgm/s10 kgm/s
- 5. Multiple ChoiceA large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg, collides with a smaller box with a mass of 2 kg that is stationary. The boxes stick together. What is the velocity of the two combined masses after collision?0 m/s4 m/s8 m/s12 m/s
- 6. Multiple ChoiceA biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?25 m/s375 m/s25 kg m/s375 kg m/s
- 7. Multiple ChoiceWhen the speed of an object is doubled, its momentumremains unchanged in accord with the conservation of momentum.doublesquadruplesdecreases
- 8. Multiple ChoiceIn this type of collision, objects tend to "stick" together.elasticinelasticThey "stick" together in both types of collisions
- 9. Multiple ChoiceA big fish swims upon and swallows a small fish at rest. After lunch, the big fish has lessmomentumvelocitymass
- 10. Multiple ChoiceAn 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. The final velocity of both objects will be0 m/s1 m/s2 m/s4 m/s
- 11. Multiple ChoiceA 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?0 kgm/s30 kgm/s50 kgm/s10 kgm/s
- 12. Multiple ChoiceThe difference between a car hitting a wall vs. a car hitting a hay stack isthe Impulse on the car hitting the wall is greaterthe change in momentum of the car hitting the wall is greaterthe force on the car hitting the hay stack is greaterthe collision time of the car hitting the hay stack is greater
- 13. Multiple ChoiceSofter landings tend toincrease impact forceincrease forceincrease collision timeincrease change in momentum
- 14. Multiple Choice
The graph shows the force on an object of mass M as a function of time. For the time interval 0 to 4 s, the total change in the momentum of the object is40 kg m/s20 kg m/s0 kg m/s– 20 kg m/s - 15. Multiple ChoiceIn any collision (crash) the ______ is ALWAYS constant.Total Momentumtotal speedtotal VelocityEnergy
- 16. Multiple ChoiceA 10kg toy truck moves at 5m/s East. It collides and bounces off of a 5kg toy car moving 10 m/s moving west. Which equation would you use to solve for the final velocity of the car?m1v1i+m2v2i=m1v1f+m2v2f(m1+m2)vi=m1v1f+m2v2fm1v1i+m2v2i=(m1+m2)vf
- 17. Multiple ChoiceIn a physics experiment, two carts of mass 1.5 kg each are rolled towards each other. The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s. The carts stick together when they collide. Calculate their final speed.0.5 m/s1.0 m/s0.33 m/s0.67 m/s
- 18. Multiple ChoiceA 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.-2.5
.
.-10-18-45 - 19. Multiple ChoiceA 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The time for the collision is _____ seconds.1.8
.
.2.53.610 - 20. Multiple ChoiceA 40-kilogram mass is moving across a horizontal surface at 5.0 m/s. What is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?1 N40 N25 N5 N
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