Question 13

Ms. Azizah experimented to determine the speed of a trolley along a straight track. The velocity, , of the trolley at a time instant after passing a fixed point is given by [Assume the motion to the right as positive.] (a) Find  (i) the initial velocity, in , of the trolley,

(ii) the time interval, in seconds, when the trolley moves to the left,

(iii) the time interval, in seconds, when the acceleration of the trolley is positive

(b) Sketch the velocity-time graph for the movement of the trolley for