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Motion in Two Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in Two Dimension1 Mark
MCQ
A projectile fired with initial velocity $u$ at some angle $\theta$ has a range $R$. If the initial velocity be doubled at the same angle of projection, then the range will be
  • A
    $2 R$
  • B
    $R / 2$
  • C
    $R$
  • ✓
    $4 R$
✓

Answer

Correct option: D.
$4 R$
(d) $\quad R=\frac{u^2 \sin 2 \theta}{g} \therefore R \propto u^2$. If initial velocity be doubled then range will become four times.

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