# Change weight to a force?

1. Jan 6, 2013

### Mecia22

dss

1. The problem statement, all variables and given/known data
In Rendezvous with Rama, they are on rung 700, so about 213 m down into the ship. The gravity is very small. It says that they weigh 10 kg in that gravity. So what gravity are they in?

2. Relevant equations

I know I use w=ma, but how do I get the 10 kg into N? I guessed that an average male weighs 72.5 kg

3. The attempt at a solution

I tried doing 10=72.5a
a=.13

But I know that weight needs to be in N, but I'm confusing myself as to how to do that in an unknown gravity.

Edit: post restored after being deleted by OP

Last edited by a moderator: Jan 7, 2013
2. Jan 6, 2013

### haruspex

When it says they weigh 10kg, it means that the force of gravity on them is the same as for a 10kg mass in Earth's surface gravity, i.e. 10g N.

3. Jan 6, 2013

### Mecia22

So you're saying I'd do:
10kg * 10 (gravity on Earth)=72.5a ??

Last edited by a moderator: Jan 7, 2013
4. Jan 6, 2013

Yes.

5. Jan 6, 2013

### Mecia22

xcsfa

Last edited: Jan 6, 2013