Question

A body falls freely for $10sec$. Its average velocity during this journey (take $g=10m{s}^{-2}$):

• A. $100m{s}^{-1}$
• B. $10m{s}^{-1}$
• C. $50m{s}^{-1}$
• D. $5m{s}^{-1}$

Answer 1

The correct option is C $50m{s}^{-1}$

Given : $g=10$ $m/s^2$ $t=10$ s

Initial velocity of body, $u=0$ m/s

Distance covered, $S=ut+\frac{1}{2}g{t}^2$

$\therefore$ $S=0+\frac{1}{2}\times 10\times {10}^2=500$ m

Average velocity, $v_{avg}=\frac{S}{t}=\frac{500}{10}=50$ m/s