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A car accelerates uniformaly from rest to 30m/s in 10s .it then travels at constant speed of 30m/s for 45s before coming to a stop uniform retardation in

5s calculate its acceleration in
first 10 s
next 45s
last 5 s
Its Physics not Maths
its math


1) 3ms^-2
2) 0
3) 0.67ms^-2
0 0 0
it comes under primary physics
hope I did it right
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