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2. motion in straight line — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics2. motion in straight line1 Mark
MCQ
A body, thrown upwards with some velocity, reaches the maximum height of $20\,m$. Another body with double the mass thrown up, with double initial velocity will reach a maximum height of..........$m$
  • A
    $200$
  • B
    $16$
  • ✓
    $80$
  • D
    $40$
✓

Answer

Correct option: C.
$80$
c
(c) Mass does not affect on maximum height.

$H = \frac{{{u^2}}}{{2g}} \Rightarrow H \propto {u^2}$,

So if velocity is doubled then height will become four times. i.e. $H = 20 \times 4 = 80\,m$

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