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Derivation of Velocity-Time Relation by Graphical Method

The accelerat...

Question

The acceleration of a body moving with a velocity of $5 {m s}^{- 1}$ , if it attains a velocity of $25 {m s}^{- 1}$ in 5s is ____ ${m s}^{- 2}$

A

8

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B

7

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C

4

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D

3

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Solution

The correct option is C 4
Initial velocity $u = 5 m / s$
Final velocity $v = 25 m / s$
Time $t = 5 s$
Using $v = u + a t$
Or $25 = 5 + a \times 5$
$⟹ a = 4 m / s^{2}$

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