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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 juggler throws balls vertically upwards with same initial velocity in air. When the first ball reaches its highest position, he throws the next ball. Assuming the juggler throws $n$ balls per second, the maximum height the balls can reach is
  • A
    $g / 2 n$
  • B
    $g / n$
  • C
    $2 g n$
  • ✓
    $g / 2 n^{2}$
✓

Answer

Correct option: D.
$g / 2 n^{2}$
d
Time taken by ball to reach highest point $=\frac{ u }{ g }$

Frequency of throw $=\frac{ g }{ u }= n$

$u =\frac{ g }{ n }$

$H _{\max }=\frac{ u ^{2}}{2 g }=\frac{\left(\frac{ g }{ n }\right)^{2}}{2 g }$

$\frac{g}{2 n^{2}}$

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