नेपा कंपलीट वन साइकिल ऑन ए सर्कुलर पथ विद अ कांफ्रेंस ऑफ 340 मीटर फाइंड द डिस्प्लेसमेंट बाय मी
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The work done on the cycle by the road is the work done by the frictional force exerted by the road on the cycle.
Now, W=F→.S→=F.Scos180∘
=−FS
=−200N×10m
=−2000J
It is this negative work which brings the cycle to rest. This is clearly in accordance with work-energy theorem.
b. The displacement of the road is zero. So, work done by the cycle on the road is zero.
(According to Newton's third law of motion, an equal and opposite force acts on the road due to the cycle. The magnitude of this force is 200N).
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