What is the initial velocity of an object moving uniformly in a straight line with an acceleration of 2m / s, and its displacement in the second second second is 12m? What's the speed at the end of the 4th second? Please explain in detail
The average velocity in the second second second is: v = s / T = 12m / 1s = 12m / s
So the velocity at 1.5 s is: v = 12 m / s
Initial velocity: V0 = v-at = 12-2 * 1.5 = 9m / S
At the end of the fourth second: V '= V0 + at' = 9 + 2 * 4 = 17m / S
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