Two identical solid spheres each of mass and diameter are kept so that they just…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two identical solid spheres each of mass

15\,\text{kg}

and diameter

20\,\text{cm}

are kept so that they just touch each other. Find the magnitude of the gravitational force between them. Take

G = 6.67\times10^{-11}\,\text{N\,m}^2\text{/kg}^2

. (a)

7.5\times10^{-8}\,\text{N}

(b)

3.8\times10^{-7}\,\text{N}

(c)

1.5\times10^{-7}\,\text{N}

(d)

9.4\times10^{-8}\,\text{N}