Answer: Zero
The speed of the ball at the highest point is zero.
Explanation:
The speed of a ball thrown straight up when it reaches the highest point is zero.
When the ball is thrown straight up the acceleration due to gravity act against it, which results in the decrease in speed as it moves up.
v(t) = u - gt
Where;
v(t) is the speed of the ball at anytime as it goes up
u = initial speed
t = time
a = acceleration due to gravity.
At the highest point, the speed would have decreased to zero so that the ball cannot go farther up again.
And also at the highest point, the kinetic energy of the ball is zero therefore there is no motion.
