Question 38: Motion in 1D

Question

The distance travelled by a particle is related to time t as $x=4\mathrm{t}^2$. The velocity of the particle at t=5s is :-

Accepted Answer

$
\begin{aligned}
& x=4 t^2 \\
& v=\frac{d x}{d t}=8 t
\end{aligned}
$
At $\mathrm{t}=5 ~\mathrm{sec}$
$
\mathrm{v}=8 	imes 5=40 \mathrm{~m} / \mathrm{s}
$

Answer

$\mathrm{25~ms^{-1}}$

Answer

$\mathrm{20~ms^{-1}}$

Answer

$\mathrm{8~ms^{-1}}$

Answer

$\mathrm{40~ms^{-1}}$

Motion in 1D

The distance travelled by a particle is related to time t as x=4\mathrm{t}^2. The velocity of the particle at t=5s is :-

Choose the correct answer: