Momentum.

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Presentation transcript:

Momentum

ρ = mv Any moving object has momentum, which depends on its: Velocity Mass Where: ρ = momentum m = mass v = velocity ρ = mv

Momentum is a vector quantity, meaning it has both magnitude AND direction. - Right and Up are + - Left and Down are - The units are kgm/s The units can also be written as N·s

Ex: Calculate the momentum of a 6 Ex: Calculate the momentum of a 6.2 kg pumpkin traveling at a velocity of 5.0 m/s west.

Ex: A baseball of mass 0. 14 kg is moving at 35. 0 m/s. a Ex: A baseball of mass 0.14 kg is moving at 35.0 m/s. a. Find the momentum of the baseball. b. Find the velocity at which a bowling ball, mass 7.6 kg, would have the same momentum as the baseball.

Change = Final - Initial Remember: Change = Final - Initial Ex: A 0.50 kg water balloon is thrown against a wall at 32 m/s coming to a stop. What was its change in momentum? b) A 0.50 kg bouncy ball is thrown at 32 m/s, bouncing back with the same speed. How does its change in momentum compare to that of the water balloon?