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Physics-

General

Easy

Question

A body is projected with a velocity $v$ and after some time it returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are

$\vec{v} / 2$ and $v / 2$
0 and $v / 2$
0 and 0
$\vec{v} / 2$ and 0

The correct answer is: 0 and $v divided by 2$

$A v e r a g e blank v e l o c i t y equals fraction numerator T o t a l blank d i s t a n c e blank c o v e r e d blank over denominator T i m e blank o f blank f l i g h t end fraction equals fraction numerator 2 H subscript m a x end subscript over denominator 2 u divided by g end fraction$
$rightwards double arrow v subscript a v end subscript equals fraction numerator 2 u to the power of 2 end exponent divided by 2 g over denominator 2 u divided by g end fraction rightwards double arrow v subscript a v end subscript equals u divided by 2$
Velocity of projection = $v blank$ [Given]
$therefore v subscript a v end subscript equals u divided by 2$

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