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|dw:1324432388146:dw|

Someone? Help? :(

a=F/m
F=driving force-resistant force
what's the driving force in this case?

driving force? It.. It doesn't say.

ohh.. Tension force.

is this moving to the left?

to the right.

ok, so no it's not the tension force. it's the force from the hanging mass

really? ohh.. okay.

gravity causes the masses to move

ohh, i see it. 'Cause when the hanging mass falls the cart moves.

yup.

so \[driving force=m _{hanging}*g\]

alright.

now the resistant force is already given in the problem

how?
And is your equation the same as:
a = m2g / (m1 + m2)?

what are you using for m2?

2.0 kg

and you said how the resistant force is already given in the problem-- how?

oops, actually different than yours but i'm confident in what i put up there

do you know a way in which I can use my formula?

my final is 2.9m/s^2

ohhh but do you know how to answer the problem with my formula? ...

tension cancels out for this system which is why i didn't use it in any of my equations

your formula seems a little off but i will double check

ohh.. okay.

ohh..

Well then, thank you so much elica for putting up with me!! Thank you!!

np

btw, why is it: F=2g-2N? Why is it 2g?

after you calculate 2g (2kg*9.8m/s^2) it will equal to 19.6N. the unit N=kg*m/s^2

just remember you can't add or subtract unless they have the same units

ohhh, so it's like m2g?

yes

ohh, okay. Thank you!

np

so F = m2g - frictional resistance? (what's the variable for it?)

ohhhh, I'm familiar with that! Oh, thank you!

yup