Two masses and are apart and attract each other with force

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

Problem

Two masses

5\,\text{kg}

and

20\,\text{kg}

are

0.5\,\text{m}

apart and attract each other with force

F

. If each mass is tripled and the separation is increased to

1.5\,\text{m}

, the gravitational force becomes (a)

9F

(b)

\dfrac{F}{3}

(c)

F

(d)

3F