1 / 6

CONSERVATION OF MOMENTUM

CONSERVATION OF MOMENTUM. Law of Conservation of Momentum. Recall Newton’s 3 rd Law: Every Action has an equal and opposite Reaction: F A = -F B The duration of the collision is the same for both objects: F A ∆t = -F B ∆t

goldy
Download Presentation

CONSERVATION OF MOMENTUM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. CONSERVATION OF MOMENTUM

  2. Law of Conservation of Momentum • Recall Newton’s 3rd Law: Every Action has an equal and opposite Reaction: FA = -FB • The duration of the collision is the same for both objects: FA∆t = -FB ∆t • F∆t = ∆p, we can substitute the expression for the change in momentum: mAvA2 –mAvA1 = -(m BvB2-mBvB1)

  3. Law of Conservation of Momentum • If you rearrange the previous, you obtain mAvA1 + mBvB1 = m AvA2 + mBvB2 • This is the mathematical expression of the LAW OF CONSERVATION OF MOMENTUM.

  4. Law of Conservation of Momentum DEFINITION: • The Total Momentum of objects before a collision is the same as the Total Momentum of the same objects after the collision. IN OTHER WORDS: • The change in momentum in an isolated system is zero. • The objects within the system may interact and exchange momenta, but the total momentum does not change!

  5. Collisions in One Dimension • NOTE: Momentum is a vector quantity, so both magnitude and direction of the momentum must be conserved.

  6. PRACTICE PROBLEMS 1. Go through the model problem p313. 2. Complete #25 and 26 p 315. 3. Complete the practice problems worksheet.

More Related