Jason ("J"), parked by the side of an east-west road, is watching a car driven by...
Jason ("J"), parked by the side of an east-west road, is watching a car driven by Priscilla ("P"), which is moving in a westerly direction. Selene ("S"), driving east at a speed of 15 m/s relative to Jason, watches the same car. Take the easterly direction as positive.
a) If Jason measures a speed of 20 m/s for car P, what velocity will Selene measure?
b) If Jason sees Priscilla brake to a halt in 10s, what acceleration (assumed constant) will he measure for her car?
c) What acceleration would Selene measure for Priscilla's car.
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