Question

A bullet comes out of the barrel of gun of length $2\, m$ with a speed $80\, m/s.$ The average acceleration of the bullet is

• A. $ 1.6\,m/ s^{2} $
• B. $ 160\,m/s ^{2} $
• C. $ 1600\,m/ s^{2} $
• D. $ 16\,m/s^{2} $

Answer 1

Answer: (C)

Given, $s=2 \,m, u=80 \,m/s , v=0$
From $v^{2}=u^{2}-2\, a s$
$\therefore (0)^{2}=(80)^{2}-2 \times a \times 2$
or $a=\frac{80 \times 80}{4}=1600 \,m / s ^{2}$