1 / 26

DAY I

Learn about momentum and impulse, including their definitions, formulas, and applications in different types of collisions. Explore elastic and inelastic collisions, conservation of momentum, and the concept of kinetic energy. Practice problems and watch videos to deepen your understanding.

aaronpatterson
Download Presentation

DAY I

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. DAY I • ON ISN • TITLE: momentum and impulse

  2. Momentum momentum - property of all moving objects; a vector quantity defined as an object's mass times its velocity from:F = ma F = mDv Dt using algebra:FDt = mDv impulsemomentum momentum p =mDv units: kg*m/s =m(Vf - Vi)

  3. This equation states that a net external force, F, applied to an object for a • certain time interval, Δt, will cause a change in the object’s momentum equal • to the product of the force and the time interval.

  4. Example problem

  5. Summary momentum… • is a quantity that describes an object's resistance to stopping (a kind of "moving inertia"). • is represented by the symbol p (boldface). • is the product of an object's mass and velocity. p = mv • impulse… • is a quantity that describes the effect of a net force acting on an object (a kind of "moving force"). • is represented by the symbol J (boldface). • is the product of the average net force acting on an object and its duration. J = F̅ Δt

  6. Practice in your ISN: use Guess for full credit

  7. Bell ringer day 2; separate sheet of paper • Summarize momentum and impulse by answering the following • Define it: • What do the letters in the formulas represent: • Formula: • Compare and contrast both :

  8. DAY 2 • On ISN • Title : conservation of momentum

  9. Conservation of Momentum Law of conservation of momentum - total momentum of all objects interacting with one another remains constant. Initial momentum is equal to final momentum. m1v1,i + m2v2,i = m1v1,f + m2v2,f total initial momentum = total final momentum Kinetic energy remains the same. No energy is lost. http://www.walter-fendt.de/ph11e/collision.htm

  10. Conservation of Momentum elastic collisions - a collision between two objects where the objects "bounce off" or remain separate from each other after the collision. m1v1,i + m2v2,i = m1v1,f + m2v2,f http://www.walter-fendt.de/ph11e/collision.htm

  11. Conservation of Momentum inelastic collisions - a collision between two objects where the objects remain "stuck" or connected together after the collision. Kinetic energy is lost to other forms of energy. m1v1,i + m2v2,i = (m1+ m2)vf http://www.walter-fendt.de/ph11e/collision.htm

  12. Inelastic collision • http://www.physicsclassroom.com/class/momentum/u4l2b.cfm

  13. Elastic or inelastic?

  14. Elastic or inelastic?

  15. Elastic or inelastic? • Find velocity of • Second car • M1=140kg • M2= 180 kg • V1i= 20m/s • V2i=30m/s • Find vf

  16. m1v1,i + m2v2,i = m1v1,f + m2v2,f • find out if energy is conserved when • m1=5 kg • m2= 5kg • V1i=10m/s • V2i=20m/s • V1f=15m/s • V2f= 15m/s • If so why if not why ?

  17. Separate sheet of paper12 videos • Write two scenarios ;one for elastic and one for inelastic collisions in complete sentences for each video

  18. https://www.youtube.com/watch?v=JAUoeqvedMo • https://www.youtube.com/watch?v=VDfsUO_KPkE • https://www.youtube.com/watch?v=eisKxhjBnZ0 • https://www.youtube.com/watch?v=seMwpP0yeu4 • https://www.youtube.com/watch?v=Skpu5HaVkOc

  19. https://www.youtube.com/watch?v=vn9mMeWcgoM • https://www.youtube.com/watch?v=2QKg5SZ_35I • https://www.youtube.com/watch?v=MFWF9dU5Zc0 • https://www.youtube.com/watch?v=7Pa_Weidt08

  20. https://www.youtube.com/watch?v=ZQIQCBvyQuM • https://www.youtube.com/watch?v=6ZfuNTqbHE8 • https://www.youtube.com/watch?v=d5exSS74Lh0

  21. DAY 3

  22. example • While walking on the beach the sand got stuck to my foot. Find the conservation of momentum if the mass of the sand is .30 g, mass of foot is 70 g. v1= 3 m/s v2= 4 m/s. find the momentum after collision if my velocity with the sand is 6 m/s. • then solve using GUESS method ; define • which problem is inelastic and which is elastic • here the sand stuck to the foot so it is inelastic • so I will use this formula m1v1,i + m2v2,i = (m1+ m2)vf Fn Fg

  23. Now you give me two problems for inelastic and two for elastic. • Include a word problem and diagram as well as the solutions. Individual work. Be creative! EXTRA POINTS FOR EXTRA IMAGINATION!

More Related