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ICSE Class 8 Answered

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Asked by jsa788153 | 19 Aug, 2018, 03:49: PM
answered-by-expert Expert Answer
(a) Usha riding a bicycle :- Yes work is done by Usha. If the average speed of cycle is v,
                                             then the workdone by usha equals the kinetic energy (1/2)×m×v2 Joules, where m is the combined mass of Usha and cycle.
 
(b) Ashok sitting in a moving car :- No work is done by Ashok. But work is done by car engine.
Answered by Thiyagarajan K | 19 Aug, 2018, 08:29: PM
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