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A cart of mass m = 0.84 kg on a track undergoes a collision with another cart. It's velocity before and after the collision, vi and vf is measured and found to be vi = 1.32±0.04 m/s and vf = 0.30±0.04 m/s. If the collision lasts a time interval Δt = 0.100±0.006 s, calculate the average force Fave = Δp/Δt. how do you calculate the standard deviation of Fave?

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