How to find the force exerted on a particle on the Earth by the Sun

AI Thread Summary
To find the force exerted on a particle on Earth by the Sun, use the formula F = -GMm/r², where r is the distance from the Sun to the particle, M is the mass of the Sun, G is the gravitational constant, and m is the mass of the particle. The discussion clarifies that the mass to be used in the equation is that of the pebble, not the Earth, since the force is specifically from the Sun on the pebble. This distinction is crucial for accurately calculating the gravitational force. The participants agree that using the pebble's mass is correct for this scenario. Understanding the correct mass to use is essential for solving the problem accurately.
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Homework Statement


Find the force exerted on a particle on the Earth by the sun.

Homework Equations


F = - GMm/r2

r = distance between sun and particle
M = mass of sun
G = Gravitational constant
m = ?

The Attempt at a Solution


Should I be using the other mass as that of the earth, or that of a pebble? I think it is the pebble. I mean it's the force BY the sun ON the pebble, but I want to make sure.
 
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Yes, in this case you should use the mass of the pebble
 
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