An object is thrown vertically upwards and rises to a height of 10 m. Calculate the velocity with which the object was thrown upwards :

7 m/s

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14 m/s

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28 m/s

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56 m/s

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Solution

The correct option is D 14 m/s
$v^{2} = u^{2} + 2 a s$
$0 = u^{2} + 2 (- 9.8) (10)$
$u = \sqrt{2 \times 9.8 \times 10} = 14 m / s$

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An object is thrown vertically upwards and rises to a height of 10 m. Calculate the velocity with which the object was thrown upwards :

The correct option is D 14 m/sv2=u2+2as0=u2+2(−9.8)(10)u=√2×9.8×10=14m/s

The correct option is D 14 m/s
$v^{2} = u^{2} + 2 a s$
$0 = u^{2} + 2 (- 9.8) (10)$
$u = \sqrt{2 \times 9.8 \times 10} = 14 m / s$