એક કાર \(50\,m\) ત્રિજ્યાવાળા વક્ર અને સમક્ષિતજ રસ્તા પર ગતિ કરે છે. જો ટાયર અને રસ્તા વચ્યેનું ધર્ષણ \(0.34\) હોય, તો કારની મહત્તમ ઝડપ \(..........\,ms^{-1}\) હશે. \(\left[ g =10 ms ^{-2}\right]\)

A \(3.4\)
B \(22.4\)
C \(13\)
D \(17\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(13\)

Step-by-step Solution

Detailed explanation

\(f_s=\frac{m v^2}{r}\) For maximum speed in safe turning, \(f _{ s }= f _{ s } \max =\mu mg\) \(v _{\max } \text { (for safe turning }=\sqrt{\mu rg }\) \(=\sqrt{0.34 \times 50 \times 10} \approx 13\,m / s\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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