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3-2.Motion in Plane
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A particle is moving on a circular path with constant speed $v$. It moves between two points $A$ and $B$. which subtends an angle $60^{\circ}$ at the centre of circle. The magnitude of change in its velocity and change in magnitude of its velocity during motion from $A$ to $B$ are respectively ..........
A$0,0$
B$v, 0$
C$0, v$
D$2 v, v$
Solution
(b)
$\Delta v=2 v \sin \frac{\theta}{2}$
$=2 v \times \sin \left(\frac{60}{2}\right)$
$|\Delta v|=v$
Change in magnitude of velocity $=0$
$\Delta v=2 v \sin \frac{\theta}{2}$
$=2 v \times \sin \left(\frac{60}{2}\right)$
$|\Delta v|=v$
Change in magnitude of velocity $=0$
Standard 11
Physics
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