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Explain - “Static friction force opposes impending motion” |
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Answer» Solution :Considermotionof anacceleration Leta BOXIS lyingat BOTTOMOF compartmentoftrain. if therewas nofrictionbottomof trainwouldhavemovedfurtherboxwill try toretain itspositiondue toinertia andwouldcollidewithrear PART of compartmentbutthisdo nothappenin dayhto daylife. Thusif can be saidthat staticfrictionforceopposesimpendingmotion. thisimpendingmotionis opposedby staticfrictionforce`(f_(G))`Thisfrictionforce provideequalaccelerationin oppositedirectionofaccelerationof trainkeepboxstationary |
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