Question

The roadway bridge over a canal is in the form of an arc of a circle of radius 20 m. The maximum
speed with which a car can cross the bridge without leaving the ground at the highest point is
(A) 28 m/s
(B) 14 m/s
(C) 10 m/s
(D) 7 m/s​

Answer 1

$\huge\boxed</p><p>{\underline{HELLO\:MATE}}$

Correct Option (b) 14 m/s✔️

Explanation:

At the highest point of the bridge for critical condition

$mg \: - \: \frac{m {v}^{2} }{r} = 0 \\ \\ \frac{m {v}^{2} }{r} = \: mg \\ \\ {v}^{max} = \sqrt{gr} = \sqrt{9.8 \times 20 } \\ \\ \sqrt{196} = \huge \bold{14} \: \: m |s$

Answer 2

Answer:

if you are a great deal of money and