The position of a particle is given by; \(\vec r(t)=4t\hat i+2t^2\hat j+5\hat k\)
where \(t\) is in seconds and \(r\) in metre. Find the magnitude and direction of velocity \(v(t)\), at \(t=1~\mathrm{s}\), with respect to \(x\)-axis:
1.
\(4\sqrt2~\text{ms}^{-1},45^\circ\)
2.
\(4\sqrt2~\text{ms}^{-1},60^\circ\)
3.
\(3\sqrt2~\text{ms}^{-1},30^\circ\)
4.
\(3\sqrt2~\text{ms}^{-1},45^\circ\)
Subtopic: Â Speed & Velocity |
 77%
From NCERT
NEET - 2023
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