Physics

Problem

Two small spheres experience a gravitational force of

60\,\text{N}

when their centres are

0.50\,\text{m}

apart. At what separation will the force become

15\,\text{N}

, all other factors remaining unchanged? a)

2.0\,\text{m}

0.25\,\text{m}

1.0\,\text{m}

0.71\,\text{m}