CBSE Class 11-science Answered
5?
Asked by smanishkumar2002 | 02 Jun, 2018, 07:57: AM
Expert Answer
Let the car has to take t seconds to pass the truck.
Distance S travelled by the car in t seconds = initial separation distance+Distance reavelled by the truck in t seconds+length of truck +length of car
S = 25+20×t+20+5 = 50+20×t = 20×t +(1/2)×0.6×t2
hence we get t2 = 500/3 ; or t = 13 s;
distance travelled by the car = 20×13+(1/2)×0.6×(500/3) = 310 m
speed of the car = 20+0.6×13 = 27.8 m/s
Answered by Thiyagarajan K | 04 Jun, 2018, 03:54: PM
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