Question Detail
Question
A ball is thrown vertically upward from the ground with a speed of 20 ms⁻¹. How long does it take to reach its highest point and how high does the ball rise?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Time to highest point: t = v/g = 20/10 = 2 s. Height: h = v²/(2g) = 400/20 = 20 m.
Hint
At highest point, final velocity = 0. Use v = u - gt and v² = u² - 2gh.