physics!!

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The figure below shows the acceleration as a function of time for an object.
(a) If the object starts from rest at t = 0, what is the velocity of the object as a function of time?
for 0s < t < 10s v(t) = m/s
for 10s < t < 26s v(t) = m/s

(b) If the object instead has a velocity of −40 m/s at t = 0, how does your result for part (a) change?
for 0 < t < 10s v(t) = m/s
for 10s < t < 26s v(t) = m/s

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