Physics. Problem solving. 01_13

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The driver of a car going 90.0 km/h suddenly sees the lights of a barrier 40.0 m ahead. It takes the driver 0.75 s to apply the brakes, and the average acceleration during braking is 10.0 m/s2.
a. Determine whether the car hits the barrier.
b. What is the maximum speed at which the car could be moving and not hit the barrier?