426,884 views
17 votes
17 votes
Determine the mass of a person if the gravitational force of attraction between the person and another of mass 42.90 kg is 0.0996381755 N when they are standing 95.32 m apart.

User Jacob Ewald
by
2.5k points

1 Answer

15 votes
15 votes

Answer:


3.16*10^1^1 kg

Step-by-step explanation:

According to Newton's Law of Universal Gravitation:


F=G(m_1m_2)/(r^2)\\F=0.0996381755N\\G=6.674*10^-^1^1(Nm^2)/(kg^2)\\m_2=42.90kg\\r=95.32m

Rewriting to solve for
m_1:


m_1=(F(r)^2)/(G(m_2))\\m_1=((0.0996381755N)(95.32m)^2)/((6.674*10^-11(Nm^2)/(kg^2))(42.90kg))\\m_1=3.16*10^1^1kg

I believe this is the answer based on the given values, but it is not a logical answer. Is it possible one or more of the values in the question were entered incorrectly?

User Fang Liu
by
2.8k points