Momentum.

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Presentation transcript:

Momentum

Quick Video http://science360.gov/obj/video/d0e16d27-05d4-4511-9394-2758aa066981/science-nfl-football-newtons-third-law-motion

Momentum Momentum can be defined as “inertia in motion." It is moving mass All objects have mass; so if an object is moving, then it has momentum Momentum depends on two things: mass and velocity

Momentum Momentum = mass X velocity p = mv where p = momentum, m = mass and v=velocity Unit for Momentum: Kg m/s

Which has more momentum and why? Discuss with your neighbor and answer the above questions A 1400 kg truck traveling at 50 m/s Or a 500 kg car traveling at 50 m/s

Which has more momentum and why? Discuss with your neighbor and answer the above questions A 1400 kg truck traveling at 10 m/s Or a 500 kg car traveling at 50 m/s

Which has more momentum and why? Discuss with your neighbor and answer the above questions A 1400 kg truck traveling at 0 m/s Or a 500 kg car traveling at 0 m/s

When will the truck and the car have the same momentum? Assume the 1400 kg truck is still traveling at 50 m/s

White board practice 1. Calculate the momentum of a 0.15 kg ball that is moving toward home plate at a velocity of 40m/s.

White board practice 2. Which has greater momentum, a 2.0kg hockey puck moving east at 2.5m/s or a 1.3kg hockey puck moving south at 3.0m/s?

White board practice 3. A track athlete throws a 2kg discus into a field with a velocity of 21m/s. What is the momentum of the discus?

White board practice 4. Calculate the momentum of a 700g ball that is rolling down a ramp at 4.6m/s.

White board practice 5. A cannon fires a 40.5kg shell toward a target and the shell moves with a velocity of 120m/s. Calculate the shell's momentum.

Summary video https://www.youtube.com/watch?v=uQ1UMHXyFrM