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In the Figure, find the velocity at t = 5 seconds. Given a is in m s^–2 and t is in s.

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20 m s^-1

30 m s^-1

25 m s^-1

15 m s^-1

answer is D.

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Detailed Solution

To find the velocity we need to find the area under the slope.

Velocity = area under the (a – t) curve

Since the section bound by the line and axes forms a triangle,

Velocity = 1/2 x base x height

= 1/ 2 × 5 × 10

= 25 m s^–1

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