Q. If a body starts from rest and travels $120\ cm$ in the 6$^{th}$ second, then what is the acceleration
A) $0.20\ m/s^{2}$
B) $0.027\ m/s^{2}$
C) $0.218m/s^{2}$
D) $0.03m/s^{2}$
Explanation
(c) $S_{n} = u + \frac{a}{2}(2n - 1) \Rightarrow 1.2 = 0 + \frac{a}{2}(2 \times 6 - 1)$
$\Rightarrow a = \frac{1.2 \times 2}{11} = 0.218\ m/s^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.