Physics · 2019
JEE Main · 9 January 2019, Shift 2 · Q3
The position co-ordinates of a particle moving in a 3-D coordinate system is given by x= a cos ω t y= a sin ω t and z= a ω t The speed of the…
The position co-ordinates of a particle moving in a $\displaystyle 3$-D coordinate system is given
by $\displaystyle x=\mathrm{a} \cos \omega \mathrm{t}$
$$y=\mathrm{a} \sin \omega \mathrm{t}
$$
and $\displaystyle z=\mathrm{a} \omega \mathrm{t}$
The speed of the particle is :
Official answer
(3)
$\displaystyle \sqrt{2} \mathrm{a} \omega$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.