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Section 61.notebook November 09, 2011 Momentum a vector quantity defined as the product of an object's mass and velocity momentum = mass and velocity p = mv . SI units are kilogrammeters per second (kg m/s) Find the momentum of a 2575 kg vehicle traveling at a velocity of 32 m/s to the west. 1 Section 61.notebook F = ma November 09, 2011 F = Δp Δt a = Δv Δt ImpulseMomentum Theorem FΔt = Δp or FΔt = Δp = mvf mvi force x time interval = change in momentum Impulse the product of the force and the time over which it acts on an object. A 1400 kg car moving west with a velocity of 15 m/s collides with a utility pole and is brought to rest in 0.30 s. Find the magnitude of the force exerted on the car during the collision. 2 Section 61.notebook November 09, 2011 Stopping times and distances depend on the impulsemomentum theorem. FΔt = Δp or FΔt = Δp = mvf mvi A 2250 kg car traveling west slows down uniformly from 20.0 m/s to 5.00 m/s. How long does it take to decelerate if the force on the car is 8450 N to the east? How far does the car travel during deceleration? 3