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posted by nanakofi on Tuesday, June 12, 2012 at 4:08pm.
an electrical energy supplied to a toy car was 240 joules.If the car weighing 40N moved through a distance of 5m,calculate the efficiency
W = F*d = 40 * 5 = 200 Joules. Eff. = (200 / 240)*100% = 83.3 %.
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