Physics

Problem

0.50\,\text{kg}

mass is attached to a spring with constant

200\,\text{N\,m}^{-1}

and oscillates horizontally with amplitude

0.10\,\text{m}

. What is the speed of the mass when the elastic potential energy is

25\%

of the total mechanical energy? a)

0.87\,\text{m\,s}^{-1}

2.45\,\text{m\,s}^{-1}

1.73\,\text{m\,s}^{-1}

1.41\,\text{m\,s}^{-1}