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A motorist suddenly notices a stalled car and slams on the brakes, decelerating at the rate of 6.3 m/s2. Unfortunately this isn't good enough, and a collision ensues. From the damage sustained, police estimate that the car was moving at 15 km/h at the time of the collision. They also measure the skid marks from the motorist's car to be 33 m long.
(a) How fast was the motorist going when the brakes were first applied?
km/h
(b) How much time elapsed from the initial braking to the collision?
s
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