posted by lisa on .
A car rolling at 18m/s when the driver hits the breaks after 5 seconds the car has slowed down to 3m/s find the cars acceleration you most write down all given information and show all work
WHat does this acceleration tell us about the motion of the car?
v = vₒ + a•t ,
a = (v - vₒ)/t = (3 – 18)/5 = - 3 m/s².
This acceleration tells us that this is decelerated motion.