• # question_answer 18) A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity $4\,m{{s}^{-1}}.$ It collides with a horizontal spring of force constant $200\,N{{m}^{-1}}.$The maximum compression produced in the spring will be A)  0.2 m        B)  0.5 mC)  0.6 m        D)  0.7 m

$\frac{1}{2}\times 3{{(4)}^{2}}+\frac{1}{2}\times \frac{(3\times {{R}^{2}})}{2}\times {{\left( \frac{4}{R} \right)}^{2}}=\frac{1}{2}K{{x}^{2}}$? $\Rightarrow$ $x=0.6\,m$