1. A particle moving with uniform acceleration in a straight line was first observed to be moving at 9m/s. After 20s, it was moving at 13.6m/s. Find its acceleration. 2. A train accelerates to a speed of 40m/s over a distance of 300m. Determine the acceleration (assume uniform) of the train. 3. A bus from at rest accelerates uniformly over a time of 6.50 seconds and covers a distance of 30m. Determine the acceleration of the bus.
