The maximum speed you can walk on the Mars

  • #1
lengleng
1
0

Homework Statement



You are an astronaut-in-training for the first mission to Mars by humans. You are about to go into a Mars simulator and need to know the answers to the following questions to complete the simulation correctly. You already have memorized basic information about Mars such as its mass (6.42x1023 kg), its radius (3.37x10^6 m) and its rotation period (its “day”) which is 24.8 hours. You also know that Newton’s universal gravitational constant (“big G”) is 6.67x10^-11 Nm2/kg2.

What is the speed at which you will be able to walk on the surface of Mars?

Homework Equations


Fnet=N-mgM=mv2/r
vM=(gM r)(1/2)

F=GMMm/rM(1/2)=mgM
gM=GMM/rM1/2


The Attempt at a Solution


use r= radius of the Mars, I got vM=3.56 km /s
use r= radius of my leg=0.7 m, I got vM=1.6 m/s.

Which one is right?
 
Last edited:

Answers and Replies

  • #2
Andrew Mason
Science Advisor
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Your problem refers to "the following questions" but there are none. What are questions?

AM
 
  • #3
JHamm
391
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r is for the radius of Mars, your first equation uses it as the radius of the arc of the circle you move over.
 
  • #4
Andrew Mason
Science Advisor
Homework Helper
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What limits the speed that you can walk on the surface?

Also the denominator is r^2 not r^1/2 in:

F=GMMm/rM2=mgM
gM=GMM/rM2

AM
 

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