# Homework Help: What is the formula to find inertia with velocity and mass?

1. Jun 1, 2017

### Megan1000

1. The problem statement, all variables and given/known data
v=2m/s
m=10kg
find the inertia

At first i did 2m/s times by 10kg which is 20 but i also did 2m/s divided by 10kg =0.2 and 10kg divided by 2m/s= 5 but i'm unsure which method is correct.
and momentum apparently isn't the same as inertia...

Inertia is when an object carries on doing the same thing unless an unbalanced force is acting on it!!

Last edited: Jun 1, 2017
2. Jun 1, 2017

### Staff: Mentor

Hi Megan1000,

Welcome to Physics Forums.

Note that you need to fill out the entire template and show what you've tried in order to solve the problem, or at least explain your understanding of it so far. Helpers are not permitted to offer any guidance otherwise.

Can you explain what you mean by "inertia"? Is it a term that is defined in your course notes or course textbook? Perhaps you meant "momentum"?

3. Jun 1, 2017

### Megan1000

at first i did 2m/s times by 10kg which is 20 but i also did 2 divided by 10 =0.2 and 10 divided by 2= 5 but i'm unsure which method is correct.
and momentum apparently isn't the same as inertia...

4. Jun 1, 2017

### scottdave

Inertia is this property, which is talked about, but rarely used in calculations (except when referring to Moment of Inertia, for objects which rotate).
Being that inertia is resistance to change in motion, the closest thing to inertia, is the mass of the object.
If you meant something different, then please clarify the problem statement.

5. Jun 1, 2017

### Megan1000

so what should i use instead then?????

6. Jun 1, 2017

### Megan1000

never mind ...
the question wanted me to work out the order from smallest to greatest inertia and it gave me more things like the first thing i showed.
it gave me the mass, and the more mass you have the more inertia you have. so i put them in order of smallest to largest mass.
lol
thanks anyways x

7. Jun 1, 2017

### CWatters

Next time please post the problem statement word for word using the template. This is to avoid helpers wasting time trying to guess the real question.