# Homework Help: Mass & weight conversion :\$

1. Nov 29, 2008

### Dandy Candy

1. The problem statement, all variables and given/known data

A number of objects are taken to the moon, where the acceleration due to gravity is about 1/6 of earth's.Complete the following table:

Item----------Mass on Earth-----Mass on Moon-----Weight on Moon---Weight on Moon

Paper clip ---------1.2 g -------------- g --------------g(f) --------------- dyne

Can of cola -------0.56 lb(m)----------lb(m) ------------lb(f) -- ------------- pdl

Hammer------------1.3 kg -------------kg -------------kg(f) ----------------- N

2. Relevant equations

3. The attempt at a solution

I think the mass on Moon will not change..right??!

the weight on Moon(the third column ) = mass*9.8*1/6 ...!!

what is ( dyne, pdl,N)?!! How to convert to these units ??

THANX =)

2. Nov 29, 2008

### Redbelly98

Staff Emeritus
Correct.
Almost, but not quite.

Moon weight = mass * g * (1/6) ​

The numerical value of g depends on what system of units are being used. It's 9.8 m/s^2, but if you use cm or inches then it would be different than 9.8

Those are all different force units.
pdl is an abbreviation for poundals (different than pounds)
N is Newtons.

3. Nov 29, 2008

### Dandy Candy

Redbelly98

Thank you very much..

Where can I get the formulas to convert into these units?!

4. Nov 29, 2008

### Dandy Candy

Moon weight = mass * g * (1/6)
The numerical value of g depends on what system of units are being used. It's 9.8 m/s^2, but if you use cm or inches then it would be different than 9.8

If I am using cm or inches .. what will the value be ??

thanx again =)

5. Nov 29, 2008

### Redbelly98

Staff Emeritus
To convert 9.8 m/s^2 into the other units, use these facts:

1 m = ____ cm?
1 m = ____ inches?

From those conversion factors, use the normal methods for converting units.

You might try a google search to see what dynes, poundals, or Newtons are. But your teacher/professor really should have talked about these in class already. Seriously, if he did not at least discuss what a Newton is, he should be fired.

EDIT. The poundal is a rather obscure unit. I did find this info:
http://en.wikipedia.org/wiki/Poundal

Last edited: Nov 29, 2008