Question

A ball is thrown vertically upward with speed $10$ m/s and it returns to the ground with speed $8$ m/s. A constant air resistance acts. The maximum height attained by the ball is?

• A. $5$ m
• B. $4.5$ m
• C. $3.5$ m
• D. $4.1$ m

Answer 1

The correct option is A $5$ m

for- $AB$ $u=10m{s}^{-1},v=0$

$S=\frac{v^2-u^2}{2g}=\frac{0-{10}^2}{-2\times 10}$

$=5m$