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1. Which of the following statements are true about momentum?

- Momentum is a vector quantity.
- The standard unit on momentum is the Joule.
- An object with mass will have momentum.
- An object which is moving at a constant speed has momentum.
- An object can be traveling eastward and slowing down; its momentum is westward.
- Momentum is a conserved quantity; the momentum of an object is never changed.
- The momentum of an object varies directly with the speed of the object.
- Two objects of different mass are moving at the same speed; the more massive object will have the greatest momentum.
- A less massive object can never have more momentum than a more massive object.
- Two identical objects are moving in opposite directions at the same speed. The forward moving object will have the greatest momentum.
- An object with a changing speed will have a changing momentum.

a. b. c. d. e. f. g. h. i. j. k. |

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Momentum |

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2. Which of the following are true about the relationship between momentum end energy?

- Momentum is a form of energy.
- If an object has momentum, then it must also have mechanical energy.
- If an object does not have momentum, then it definitely does not have mechanical energy either.
- Object A has more momentum than object B. Therefore, object A will also have more kinetic energy.
- Two objects of varying mass have the same momentum. The least massive of the two objects will have the greatest kinetic energy.

a. b. c. d. e. |

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Momentum |

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3. Which of the following statements are true about impulse?

- Impulse is a force.
- Impulse is a vector quantity.
- An object which is traveling east would experience a westward directed impulse in a collision.
- Objects involved in collisions encounter impulses.
- The Newton is the unit for impulse.
- The kg•m/s is equivalent to the units on impulse.
- An object which experiences a net impulse will definitely experience a momentum change.
- In a collision, the net impulse experienced by an object is equal to its momentum change.
- A force of 100 N acting for 0.1 seconds would provide an equivalent impulse as a force of 5 N acting for 2.0 seconds.

a. b. c. d. e. f. g. h. i. |

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Momentum and Impulse Connection |

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4. Which of the following statements are true about collisions?

- Two colliding objects will exert equal forces upon each other, even if their mass is significantly different.
- During a collision, an object always encounters an impulse and a change in momentum.
- During a collision, the impulse which an object experiences is equal to its velocity change.
- The velocity change of two respective objects involved in a collision will always be equal.
- While individual objects may change their velocity during a collision, the overall or total velocity of the colliding objects is conserved.
- In a collision, the two colliding objects could have different acceleration values.
- In a collision between two objects of identical mass, the acceleration values could be different.
- Total momentum is always conserved between any two objects involved in a collision.
- When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force.
- When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater momentum change.
- A moving object collides with a stationary object; the stationary object has significantly less mass. The stationary object encounters the greater collision force.
- A moving object collides with a stationary object; the stationary object has significantly less mass. The stationary object encounters the greater momentum change.

a. b. c. d. e. f. g. h. i. j. k. l. |

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Momentum and Impulse Connection || The Law of Action-Reaction (Revisited) |

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5. Which of the following statements are true about elastic and inelastic collisions?

- Perfectly elastic and perfectly inelastic collisions are the two opposite extremes along a continuum; where a particular collision lies along the continuum is dependent upon the amount kinetic energy which is conserved by the two objects.
- Most collisions tend to be partially to completely elastic.
- Momentum is conserved in an elastic collision but not in an inelastic collision.
- The kinetic energy of an object remains constant during an elastic collision.
- Elastic collisions occur when the collision force is a non-contact force.
- Most collisions are not inelastic because the collision forces cause energy of motion to be transformed into sound, light and thermal energy (to name a few).
- A ball is dropped from rest and collides with the ground. The higher that the ball rises upon collision with the ground, the more elastic that the collision is.
- A moving air track glider collides with a second stationary glider of identical mass. The first glider loses all of its kinetic energy during the collision as the second glider is set in motion with the same original speed as the first glider. Since the first glider lost all of its kinetic energy, this is a perfectly inelastic collision.
- The collision between a tennis ball and a tennis racket tends to be more elastic in nature than a collision between a halfback and linebacker in football.

a. b. c. d. e. f. g. h. i. |

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Momentum |

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