Q 3.10 A player throws a ball upwards with an initial speed of 29.4 ms-1.
(c) Choose the x = 0 m and t = 0 s to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of x-axis, and give the signs of position, velocity and acceleration of the ball during its upward, and downward motion.
The sign of velocity is positive during the motion in downwards direction and negative during motion in upwards direction. The signs of position and acceleration are positive during motion in both directions.