Question

A body moves along an uneven horizontal road surface with constant speed at all points. The normal reaction of the road on the body is:

• A. Maximum at A
• B. Maximum at B
• C. Minimum at C
• D. The same at A, B and C

Answer 1

The correct option is A Maximum at A

$\begin{array}{c}AtA;N_A-mg=\frac{m{V}^2}{R_A};N_A=mg+\frac{m{V}^2}{R_A}\\ AtB;N_B=mg=\frac{m{V}^2}{R_B}and\\ AtC;N_C=mg+\frac{m{V}^2}{R_C}\\ \therefore R_A<R_C\\ \therefore N_{A}isgreatestamongall\end{array}$

Hence,

option $\left(A\right)$ is correct answer.