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Dimensional Analysis

A stone movin...

Question

A stone moving vertically upwards has its equation of motion $s = 490 t - 4 t^{2}$ .The maximum height reached by the stone is

A

12250

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B

1225

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C

36750

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D

None of these

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Solution

The correct option is A 12250
Here u=490, g=9.8 (downward)
Therefore, $S = \frac{u^{2}}{2 g} = 12250$

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