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3-2.Motion in Plane
medium
A particle is moving in a circle of radius $r$ having centre at $O$, with a constant speed $v$. The magnitude of change in velocity in moving from $A$ to $B$ is
A$2 v$
B$0$
C$\sqrt{3} v$
D$v$
Solution
(d)
$[\Delta \vec{V}]=2 V \sin \frac{\theta}{2}=2 \times V \times \sin \left(\frac{60^{\circ}}{2}\right)=2 \times V \times \frac{1}{2} \Rightarrow V=|\Delta \vec{V}|$
$[\Delta \vec{V}]=2 V \sin \frac{\theta}{2}=2 \times V \times \sin \left(\frac{60^{\circ}}{2}\right)=2 \times V \times \frac{1}{2} \Rightarrow V=|\Delta \vec{V}|$
Standard 11
Physics
