Physics

Problem

1\,\text{kg}

body performs SHM with amplitude

0.20\,\text{m}

and angular frequency

4\,\text{rad}\,\text{s}^{-1}

following

x(t)=0.20\cos(4t)

(all quantities in SI units). Calculate its kinetic energy at

t=0.25\,\text{s}

. a)

0.32\,\text{J}

0.45\,\text{J}

0.23\,\text{J}

0.094\,\text{J}