Question

A ball is thrown vertically upward. It has a speed of $10\ m/s$ when it has reached one half of its maximum height. How high does the ball rise?
(Take $g = 10\, m/s^2$)

• A. 10 m
• B. 5 m
• C. 15 m
• D. 20 m

Answer 1

Answer: (A)

10 m

Answer 2

$v^2 =u^2 - 2gh$
After reaching maximum height velocity becomes zero.
$0 = (10)^2 - 2 \times 10 \times \frac{h}{2}$
$\therefore h = \frac{200}{20}$
$h= 10\, m.$

So, the correct option is (A): 10 m