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Laws of Motion — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsLaws of Motion1 Mark
Question
The mountain road is generally made winding upwards rather than going straight up. Why?
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Answer

When we go up a mountain, the opposing force of friction $\text{F}=\mu\text{R}=\mu\text{mg}\ \cos.$ where $\theta$ is angle of slope with horizontal. To avoid skidding, F should be large. $\therefore\cos\theta$ should be large and hence, 0 must be small. Therefore, mountain roads are generally made winding upwards. The road straight up would have large slope.

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