The speed of an object traveling along the x axis increases atthe constant rate

Question

The speed of an object traveling along the x axis increases atthe constant rate of 3.4 m/s each second. At t = 0.0 s, itsvelocity is 1.2 m/s and its position is + 7.9 m.

(a) How fast is it moving when its position is 8.0 m? ........m/s
(b) At this point, how much time has elapsed from the start att = 0.0 s? ........s The speed of an object traveling along the x axis increases atthe constant rate of 3.4 m/s each second. At t = 0.0 s, itsvelocity is 1.2 m/s and its position is + 7.9 m.

(a) How fast is it moving when its position is 8.0 m? ........m/s
(b) At this point, how much time has elapsed from the start att = 0.0 s? ........s

Explanation / Answer

given initial velocity u = 1.2 m/s the acceleration is a = 3.4 m/s initial position is = +7.9 m a) the displacement is S = 0.1 m       we have v2 -u2 = 2aS                     v = 2.12 m/s b ) we have   a = ( v- u ) /t                    t = ( v - u ) / a = 0.2705 s

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