Question

A body is fired vertically upward. At half the maximum height , the velocity of the body is $10m/s$. The maximum height raised by the body is

• A. $0m$
• B. $10m$
• C. $15m$
• D. $20m$

Answer 1

The correct option is B $10m$

If we consider half height as a starting point.

Then the initial velocity$\left(\mu \right)$=10m/s

Final velocity(v)=$0m/s$

$Acceleration\left(a\right)=1$0m/$s^2$

Then by using the formula

$2as$=$v^2-u^2$

$-20s$ = $0m/s^2-10m/s^2$

$-20s=-100$

$s=5m$

Now, as half height was taken as starting point

Thus total height=$2\times 5$ = $10m$