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1
JEE Main 2019 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
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The position co-ordinates of a particle moving in a 3-D coordinate system is given by
x = a cos$$\omega $$t
y = a sin$$\omega $$t and
z = a$$\omega $$t

The speed of the particle is :
A
$$\sqrt 2 \,a\omega $$
B
$$a\omega $$
C
$$\sqrt 3 \,a\omega $$
D
2a$$\omega $$

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