A car is moving at 32,4 m/s. On wet concrete, a car can decelerate at a rate of 9,21 m/s2. Finding the displacement from the point where the driver sees a traffic light turn red, taking into account his reaction time of 0,70 s to get his foot on the brake. A commuter backs her car out of her garage with an acceleration of 1.40 m/s2. How long does it take her, in seconds, to reach a speed of 2.00 m/s if she starts from rest? (Give your answer as just a number) A rock is thrown downward from a cliff with an initial speed of 6.50 m/s. The rock takes 2.65 seconds to hit the ground. How high is the cliff, in meters