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First Equation of Motion

A ball is ini...

Question

A ball is initially moving with a velocity $0.5 m s^{- 1}$ . Its velocity decreases at a rate of $0.05 m s^{- 2}$ . How much distance will the ball travel before it stops ?

2.5 m

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25 m

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5 m

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10 m

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Solution

The correct option is A $2.5 m$
From equation of motion $v^{2} = u^{2} + 2 a S$
$0 = (0.5)^{2} - 2 \times 0.05 \times S$
or $0.1 S = 0.25 o r S = 2.5 m$

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