Martian's Weight on Mars Calculated

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SUMMARY

The discussion focuses on calculating the weight of a Martian with a mass of 35.0 kg on Mars using the formula for gravitational force, FG = GM1M2/R^2. Participants emphasize the need to determine the gravitational acceleration (g) on Mars, which is essential for converting mass to weight using the equation W = mg. The correct gravitational constant (G) and mass of Mars (6.42 x 10^23 kg) are provided, along with the radius of Mars (3.40 x 10^6 m) for accurate calculations. The final calculation involves substituting these values into the gravitational force equation to find the Martian's weight.

PREREQUISITES
  • Understanding of gravitational force formula FG = GM1M2/R^2
  • Knowledge of gravitational acceleration (g) and its application in weight calculations
  • Familiarity with universal gravitational constant G (6.67 x 10^-11 N·(m/kg)^2)
  • Basic understanding of mass and weight relationship (W = mg)
NEXT STEPS
  • Research how to calculate gravitational acceleration on different celestial bodies
  • Learn about the properties of Mars, including its mass and radius
  • Explore the concept of gravitational force and its applications in astrophysics
  • Study the differences between mass and weight in various gravitational fields
USEFUL FOR

Students studying physics, educators teaching gravitational concepts, and anyone interested in planetary science and weight calculations on different celestial bodies.

AmericanBoy
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Homework Statement


On Mars, a martian tells you he has 35.0kg of mass. What is his weight on mars?

Mars Info:
Mass= 6.42x10^23
Radius= 3.40x10^6
Radius of Orbit about sun= 2.30x10^11

Homework Equations


FG=GM1M2/R^2

The Attempt at a Solution


I tried using the equation above, but i got 4.28x10^13. I am pretty sure you have to find Gravity on Mars and multiply it with the martians mass because mass to weight on Earth is mass(kg) x 9.8 m/s^2 (Gravity on Earth)(Hopefully this is a better format than my last thread.
 
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Btw, please show how you got the answer.
 
it sounds like you forgot to multiply by G.. please post all working.
 
That's the problem. How do you find G on Mars?
 
AmericanBoy said:
That's the problem. How do you find G on Mars?
G is a universal constant (not to be confused with g).
 
If you have a data sheet, the gravitational field strengths for various planets may be given. This would allow you to use W=mg.
 
CheesyPeeps said:
If you have a data sheet, the gravitational field strengths for various planets may be given. This would allow you to use W=mg.
I'm sure AmericanBoy is supposed to use the information about Mars provided.
 
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CheesyPeeps said:
If you have a data sheet, the gravitational field strengths for various planets may be given. This would allow you to use W=mg.
How would information like this help the OP who is trying to learn the fundamentals?

Chet
 
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It looks like you have the correct formula, you just plug everything into get the final answer. (6.67 x 10^-11N·(m/kg)^2)(35kg)(6.42 x 10^23kg) / (3.4 x 10^6m)^2.
 

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