Moon Walkers.

[Hoppy]

http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/forces/revision/3/

[tinman]

Consider the folowing two scenarios.
1. An astronaut stands on a one metre high platform on the earth and jumps off. He does the same from a one metre high platform on the moon. He hits the moon with less energy than he does on the earth.

2. He stands on the earth and jumps into the air. He does the same on the moon using the same amount of effort for the jump. In this situation , whenhe comes back down the energy that he impacts both the moon and earth is exactly the same.

I think youll find I understand the dynamics of this perectly well.

I think you will find that you have not read the situation that myself and MH are talking about.
So before making comments,perhaps spend some time reading the thread first,as what you just described has nothing to do with what we are talking about--that being the difference of an astronauts weight and impact he has on the moon--nothing to do with earth at all.

Brad

[tinman]

http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/forces/revision/3/

Thank you hoppy.
Now maybe MH will understand as to how more weight equates to more newtons of force,and thus more impact energy when the astronaut lands,where as mass has nothing to do with it in this case,as mass is the same everywhere.

Brad

[MileHigh]

Thank you hoppy.
Now maybe MH will understand as to how more weight equates to more newtons of force,and thus more impact energy when the astronaut lands,where as mass has nothing to do with it in this case,as mass is the same everywhere.

Brad

In fact Hoppy was trying to show you something to support what I have been saying to you.  He was finding you an example on the web just like you asked for.

Suppose that you are an astronaut in training on Earth, and you fall and hit the ground at 2 meters per second.
Suppose that you are an astronaut on the moon and you fall and hit the surface of the moon at 2 meters per second.
Suppose that you are an astronaut and are weightless out on a space walk servicing the International Space Station and something happens you hit the side of the station at 2 meters per second.

In all three cases the impact energy will be the same.  It's not about weight, it's about mass.

[MileHigh]

So once again,the astronaut and his suit do not weigh 130KG's on the moon-they weigh 21.45KG's.

I will just tell you one more time that you never say "kilograms of weight."  That is cringe worthy.  Ignore it if you want but be aware that it makes people cringe.