Physics

Problem

Spring A has spring constant

k

and is stretched by

4\,\text{cm}

, storing elastic potential energy

E

. Spring B has spring constant

2k

. To store the same energy

E

in spring B, its extension should be closest to a)

2.0\,\text{cm}

2.8\,\text{cm}

4.0\,\text{cm}

5.7\,\text{cm}