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A car moving on a road with uniform accleration covers 20m in the first second and 30m in the next second. What is accleration?
Asked by acv27joy | 26 May, 2018, 09:46: PM
answered-by-expert Expert Answer
Let u0 is initial speed. to get distance covered in first one second with acceleration a, we need to use equation "S=ut+(1/2)at2 "
 
hence for first one second we have :  u0+(1/2)a = 20 ....................(1)
 
at the end of first one second, speed u1 is  :  u1 = u0+a
 
Hence for next one second we have = (u0+a)+(1/2)a = 30 ..............(2)
 
By solving (1) and (2), we get u0 = 15 m/s, a = 10 m/s2
Answered by Thiyagarajan K | 27 May, 2018, 08:06: AM

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