Force of Gravity/Friction Question

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To determine the weight of a 50kg object on the moon, the gravitational force must be calculated using Newton's law of gravitation rather than simply multiplying mass by a constant. The formula for gravitational force is Fg = G(Mm * m) / r², where G is the gravitational constant, Mm is the mass of the moon, m is the mass of the object, and r is the distance from the center of the moon to the object. The initial approach of using Fg = Mg with incorrect values is not valid. Understanding the correct application of gravitational equations is essential for solving the problem accurately. Properly applying these principles will yield the correct weight of the object on the moon.
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Homework Statement


Hey, I'm new to the forum. I have taken introductory Physic, but missed the first month of class due to serious personal issues. Anyways here's my question:

Determine the weight of a 50kg object on the surface of the moon(Do not use g=1.63N/kg)

Mm(Moon)=7.4x10 to the power of 22kg


Homework Equations


Fg=Mg?




The Attempt at a Solution


Like I said, I am pretty lost, but I've come up with this so far:
Fg=Mg
Fg=(7.4x10 to the power of 22kg)(50kg)
I wouldn't be surprised if I was way off, but I've tried a few formulas and have been way off.

Thanks!
 
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studen527 said:

Homework Equations


Fg=Mg

While this is correct, you are using your M and g incorrectly.


The weight of an object on a planet, is nothing but the gravitational force of attraction between the mass and the planet.

So how do you find the force of attraction between two masses? (Hint: Newton's law of gravitation)
 
If this is early introductory physics surely that's all the lecturer/teacher wants..
 

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