Embedded Files
🟢 8: F 1/30 - momentum intro (1)
🟢 8: F 1/30 - momentum intro (1)
Today, we will introduce momentum and impulse. We will learn that momentum p = mv and that the change in momentum Δp = impulse FΔt. We will look at examples of how impulse is altered. We will also start to discuss conservation of momentum in a collision.
Presentation: Momentum Presentation
Homework: Review the concepts that we learned in class today.
Optional Extra Practice: Page 1 in Momentum Packet (SOLUTIONS)
🟩❗8: M 2/2 - 📖 impulse problems
🟩❗8: M 2/2 - 📖 impulse problems
Today, we'll first finish the Momentum Presentation we have been going through. Then, we'll practice impulse problems.
Homework: Work on impulse problems above.
Optional Extra Practice: 📖textbook Ch 9 impulse problems: #3, 12, 15, 17, 46, 47, 48. Page 1 in Momentum Packet (SOLUTIONS)
Here's a solution for one of the most complex examples 6.5 from this presentation. Note that the video ultimately finds the "force of impact," or the net force here which is the answer to part (b). However in part (c) of our problem, we're asking for the force that the ground exerts on the worker, so for that part, draw a free body diagram and rearrange ΣF = FN - Fg for FN .
💚 8: T 2/3 - conservation of momentum
💚 8: T 2/3 - conservation of momentum
Today, we’ll first discuss how we a system with no impulse will conserve momentum. We'll start by exploring momentum conservation in "explosions." Then, we'll continue to discuss elastic and inelastic collisions and then do a few problems. Remember that momentum is conserved in all collisions, but energy is only conserved in elastic collisions. Also remember that in a collision between two objects, each of the objects experiences an equal impulse (the momentum equivalent to Newton's 3rd Law).
Presentation: Collisions (we'll do some sample problems found here)
Homework: Review your notes.
If you need extra support on today's lesson or if you missed today's lesson for any reason, check out the following videos which could be helpful in catching you up on understanding collisions.
And here is another video which helps to illustrate the difference between elastic and inelastic collisions. Make sure you make it to the end of the video when he talks about the real-world caveat at around 6:00.
Page updated
Google Sites
Report abuse