Q. A body starts from rest. What is the ratio of the distance travelled by the body during the 4th and 3rd second
A) $\frac{7}{5}$
B) $\frac{5}{7}$
C) $\frac{7}{3}$
D) $\frac{3}{7}$
Explanation
(a) $S_{n} = u + \frac{a}{2}(2n - 1) = \frac{a}{2}(2n - 1)$ because $u = 0$
Hence $\frac{S_{4}}{S_{3}} = \frac{7}{5}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.