A ball is thrown up at a speed of 4 m/s with constant acceleration. Find the maximum height reached by the ball . Take $g = 10 m s^{- 2}$

0.4m

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0.8m

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1.0 m

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1.4 m

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Solution

The correct option is A 0.8m
Constant acceleration $g$ occurs downwards.
Consider the equation of motion,
$v^{2} - u^{2} = 2 a s$
$⟹ 0^{2} - 4^{2} = 2 \times - 10 \times h$
$⟹ h = 0.8 m$

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