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Gravitation — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceGravitation1 Mark
MCQ
An object is thrown vertically upwards with a velocity $u,$ the greatest height $h$ to which it will rise before falling back is given by:
  • A
    $\frac{\mu}{\text{g}}$
  • ✓
    $\frac{\mu^2}{2\text{g}}$
  • C
    $\frac{\mu^2}{\text{g}}$
  • D
    $\frac{\mu}{2\text{g}}$
✓

Answer

Correct option: B.
$\frac{\mu^2}{2\text{g}}$
At the maximum height $'h\ ',$ the velocity becomes zero.
Using,
$\text{v}^2 = \mu^2 − 2\text{gh}$
$\Rightarrow 0 =\mu^2 − 2\text{gh}$
$\Rightarrow \text{h}=\frac{\mu^2}{2\text{g}}$

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