Physics - Chapter 7
Terms & Objectives
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Note: The following terms and objectives are based on the Indiana Standards 2000 for Physics 1. You may download the complete physics standards by clicking here, or view the standards relevant to Chapter 7 - Momentum here.
New Terms in Chapter 7:
Chapter 7 Objectives:
When you have completed chapter 7, you should be able to:
- ... solve problems involving the impulse on an object, the forces acting on it, and the
time in which they act.
- ... solve problems involving the momentum of an object, its mass, and its velocity.
- ... recognize that impulse and momentum are vector quantities.
- ... give real-life examples
of how force and time interact to change the momentum of an
- ... use the impulse-momentum equation to solve numeric problems.
- ... explain why a greater impulse acts on an object that
bounces during a collision as opposed to an object that simply
comes to a stop, and explain what effect this extra impulse has on
- ... state
the Law of Conservation of Momentum.
- ... distinguish between elastic and inelastic collisions.
- ... use the Law of Conservation of Momentum to calculate the
velocity of objects undergoing a simple inelastic collision or an explosion.
- ... apply the Law of Conservation of Momentum conceptually to real-life
situations such as throwing a ball or the motion of a rocket.
Possible Misconceptions to Correct:
Do you believe that any of the following statements are true? They
AREN'T! When you finish Chapter 7, you should
understand that each of these statements is FALSE,
- WRONG: The momentum of an object decreases by
itself. (Objects "lose momentum".)
- WRONG: Impulse = Momentum
- WRONG: Momentum is conserved only when
collisions are perfectly elastic.
- WRONG: Impact and Impulse are the same.
- WRONG: When 2 objects collide and stick
together, the impact force is distributed over the entire time
they are stuck together.
last update June 5, 2008 by JL Stanbrough