Introduction to Acceleration Practice Problems Average Acceleration 1. As the shuttle bus comes to a sudden stop to avoid hitting a dog, it accelerates uniformly at -4.1 m/s2 as it slows from 9.0 m/s to 0 m/s. Find the time interval of acceleration for the bus. 2. Turner’s treadmill runs with a velocity of -1.2 m/s and speeds up at regular intervals during a half-hour workout. After 25 minutes, the treadmill has a velocity of -6.5 m/s. What is the average acceleration of the treadmill during this period? 3. Suppose a treadmill has an average acceleration of 4.7 x 10-3 m/s2. How much does its velocity change after 5.0 minutes. Displacement with Constant Uniform Acceleration 1. A car accelerates uniformly from rest to a speed of 23.7 km/h in 6.5 s. Find the distance the car travels in this time. 2. When Maggie applies the brakes of her car, the car slows uniformly from 15.0 m/s to 0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign? 3. A driver in a car traveling at a speed of 78 km/h sees a cat 101 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 99 m? 4. A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 minutes. How fast is the car moving after this time?