Two objects are experiencing a force of gravitational attraction. If you triple the mass of one of the objects and double the distance between their centres, the new force of gravity compared to the old (Fg) will be:
Question 3 options:
A) 3 Fg
B) 1.5 Fg
C) 0.75 Fg
D) the same

Question

Two objects are experiencing a force of gravitational attraction.  If you triple the mass of one of the objects and double the distance between their centres, the new force of gravity compared to the old (Fg) will be:
Question 3 options:
	A)	3 Fg
	B)	1.5 Fg
	C)	0.75 Fg
	D)	the same

daenio · Answer

@Shane_B 
@CarlosGP

goformit100 · Answer

B)	1.5 Fg

daenio · Answer

That's what I thought too. How did you get B)?

shane_b · Answer

Check your last post...C was not correct :)  I'll look at this one in just a moment

shane_b · Answer

For this one, you can just write out both scenarios and see what the difference would be:$$F_{g1}=G\frac{m_1m_2}{r^2}$$$$F_{g1}=G\frac{3m_1m_2}{(2r)^2}$$Just looking at what's different you should see that:$$\frac{3}{2^2}=\frac{3}{4}=0.75$$

daenio · Answer

Hey, so for the last post, is C) correct?

shane_b · Answer

Yep

daenio · Answer

Cool, thank you!

shane_b · Answer

No worries, good luck!

daenio · Answer

Thanks, hey I have about 2 more questions.

daenio · Answer

I guess I'll post them in a new thread.

shane_b · Answer

ok