A scooter starts from rest at a traffic signal and moves in a straight line with uniform acceleration. After taking some readings, a student records the following information:
Initial velocity at the signal: 0m/s
Velocity after 5s: 18m/s
Assuming the acceleration remains the same for the next 3s, answer the following.
(i) Calculate the magnitude of the scooter’s acceleration during the first 5s.
(ii) Find the velocity of the scooter at the end of the next 3s.
(iii) State whether the acceleration obtained in part (i) is positive or negative. Give one reason for your answer.