1.

A car increase its s(A) 30 mscrease its speed from 20 kmh- to 50 kmh-in 10 s. its acceleration is -(B)3 ms-(C) 18 ms-2(DX0.83 ms?

Answer»

O. 83m/s

Using formula

v = u + at

v = final speedu = initial speeda = accelerationt = time taken

50*5/18 = 20*5/18 + a*10a*10= 5/18(50 - 20)a = 5/18 * (30)/10a = 5/6 = 0.83 m/s^2

(D) is correct option



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