A car traveling east at 41.5 m/spasses a trooper hiding at the roadside. The dri

Question

A car traveling east at 41.5 m/spasses a trooper hiding at the roadside. The driver uniformlyreduces his speed to 25.0 m/s in 2.80s. (a) What is the magnitude and direction of thecar's acceleration as it slows down?
magnitude 1 m/s2 direction 2---Select---eastwestsouthnorth (b) How far does the car travel in the 2.80-s time period?
3 m (a) What is the magnitude and direction of thecar's acceleration as it slows down?
magnitude 1 m/s2 direction 2---Select---eastwestsouthnorth (b) How far does the car travel in the 2.80-s time period?
3 m magnitude 1 m/s2 direction 2---Select---eastwestsouthnorth

Explanation / Answer

a) the magnitude of car's acceleration is     a = (u-v)/t        =(41.5m/s-25m/s)/2.80s        = -------------- the direction of the car's acceleration is opposite to thedirection of motion i.e along west b) the distance traveled by the car in 2.80s      s = ut+1/2*at2         = 41.5m/s*2.80s +1/2*a*(2.80s)2          =--------------

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