Question

a body with an initial velocity of 8 m/s moves with a constant acceleration and travels 640 m in 40 seconds. Whats its acceleration.

Answer 1

s = (v + u)/2 * t 

640 = ( v + 8)/2 * 40 

640 = (v + 8) * 20 

32 = v + 8 

v = 24 m/s 

a = (v - u)/t 

= (24 - 8)/40 

= 16/40 

= 0 . 4 m/s^2

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