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Laws of Motion — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsLaws of Motion2 Marks
Question
Find the minimum force required to pull a body up a rough inclined plane $(\theta,\mu).$
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Answer

As the mass has to be pulled up, the component of force of gravity and the force of friction act downward. Therefore, the minimum force required is, $(\text{mg}\sin\theta+\mu\text{ mg}\cos\theta).$

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