Question

A velocity of a particle at an instant is $10\, m / s$. After $3\, s$ its velocity will become $16\, m / s$. The velocity at $2\, s$, before the given instant will be :

• A. 6 m/s
• B. 4 m/s
• C. 2 m/s
• D. 1 m/s

Answer 1

Answer: (A)

6 m/s

Answer 2

$16=10+3 a\left[\right.$ Here, $\left. u=10\, m / s,\, v=16\, m /s,\, t=3\, s,\, a=2 m / s ^{2}\right]$ and $10=u+2 \times 2$ [u = required velocity] $=6\, m / s (\because t=2\, s )$