A mass of 0.5 kg moving with a speed of 1.

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A mass of $0.5\,kg$ moving with a speed of $1.5 \,m/s$ on a horizontal smooth surface, collides with a nearly weightless spring of force constant $k = 50\;N/m$. The maximum compression of the spring would be ............. $\mathrm{m}$

A

$0.15$

B

$0.12$

C

$1.5$

D

$0.5$

A mass of $0.5\,kg$ moving with a speed of $1.5 \,m/s$ on a horizontal smooth surface, collides with a nearly weightless spring of force constant $k = 50\;N/m$. The maximum compression of the spring would be ............. $\mathrm{m}$

The kinetic energy of mass is converted into potential energy of a spring
$\frac{1}{2}m{v^2} = \frac{1}{2}k{x^2}$

$⇒$ $x = \sqrt {\frac{{m{v^2}}}{k}} = \sqrt {\frac{{0.5 \times {{(1.5)}^2}}}{{50}}} = 0.15\,m$