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4-1.Newton's Laws of Motion
hard

$ m_1 = 4m_2$ છે . $m_2$ ને સ્થિર થવા માટે ........ $cm$ વધારાનું અંતર કાંપવું પડે.

A

$20$

B

$40$

C

$60$

D

$80$

Solution

$v = u + at$       [ $a = g/2 = \frac{{10}}{2} = 5\,m/{s^2}$]

$v = 0 + 5 \times 0.4$ $ = 2m/s\,\, = \,200\,cm/sec.$

$H = \frac{{{v^2}}}{{2g}} = \frac{{{{\left( {200} \right)}^2}}}{{2 \times 100}}\, = \,20\,cm$

Standard 11
Physics

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