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Mass & weight conversion :$

by Dandy Candy
Tags: conversion, mass, weight
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Dandy Candy
#1
Nov29-08, 07:21 AM
P: 10
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 =)
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Redbelly98
#2
Nov29-08, 08:41 AM
Mentor
Redbelly98's Avatar
P: 12,064
Quote Quote by Dandy Candy View Post
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??!
Correct.
the weight on Moon(the third column ) = mass*9.8*1/6 ...!!
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

what is ( dyne, pdl,N)?!! How to convert to these units ??
Those are all different force units.
pdl is an abbreviation for poundals (different than pounds)
N is Newtons.
Dandy Candy
#3
Nov29-08, 09:44 AM
P: 10
Redbelly98

Thank you very much..

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

Dandy Candy
#4
Nov29-08, 09:46 AM
P: 10
Mass & weight conversion :$

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 =)
Redbelly98
#5
Nov29-08, 09:58 PM
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Redbelly98's Avatar
P: 12,064
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


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