Answer to Question #94708 in Mechanics | Relativity for iv

Question #94708
why do we need to find cos(theta) why can we not just find (d) and plug that into the gravational force equation
1
Expert's answer
2019-09-18T09:52:30-0400

Write the gravitational force equation:


F=Gm1m2d2,F=G\frac{m_1m_2}{d^2},

where dd - distance between centers of mass of objects 1 and 2 with corresponding masses. We just find that distance and plug that into gravitational force equation. Maybe you will need a cosine of angle between a very small object and a certain point of big planet in the following situation. In that case,


d=L cosθ.d=L\space\text{cos}\theta.

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