Physics HELP!!!!! On the surface of the Moon an astronaut has a weight of Fg = 120 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg.
Solve numerically for the mass of the astronaut ma in kg.

Question

Physics HELP!!!!!  On the surface of the Moon an astronaut has a weight of Fg = 120 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg. 
Solve numerically for the mass of the astronaut ma in kg.

anonymous · Answer

$$F=G\frac{m_mm_a}{r^2}$$ where $$m_m$$is the moon's mass,$$m_a$$is the astronaut's mass and $$r$$is the moon's radius. You have everything except $$m_a$$just substitute and it should be easy

anonymous · Answer

So, i may be wrong here. I did F=6.67 x 10-11 N m2kg2 (7.35 x 1022 kg. )(ma) divided by1.74 x 106 m^2

anonymous · Answer

$$F$$is already given as 120N,now you have to solve for $$m
_a$$ which is the only unknown, your approach is correct just remember to include everything.

anonymous · Answer

Great!!! thank you for your help