A scooter is moving along a straight road. Its velocity increases uniformly from 5m/s to 20m/s in the first 3s and then continues to increase with the same acceleration for the next 4s. Answer the following:
(a) Calculate the scooter’s acceleration during the first 3s.
(b) Using a velocity–time graph or otherwise, determine the displacement covered in the first 3s.
(c) Find the velocity of the scooter at the end of 7s from the start of the motion.