Question

Two objects with different masses interact, characterize the forces

Answer 1

They must be different
They might be different
always equal and opposite
always the same

Answer 2

would this be b? because you dont know the amount of force of them but you know they have different masses

Answer 3

it just depends on which one has the bigger mass

Answer 4

Yeah, I agree. Netwon's Second Law is \(F=ma\)

Therefore forces are different since masses are different.

Answer 5

but its not a must right?

Answer 6

im like debating on a and b :/

Answer 7

oh now you mention it, I believe it's B since acceleration can be different too.

Answer 8

different masses and acceleration can be equal, like \(6\cdot6 = 9\cdot4\)

Answer 9

yes thats actually the next question about the accelerations of the 2

Answer 10

would the answer be the same about the acceleration saying you dont know the mass ?

Answer 11

im inclining more toward c, the forces need to be equal and opposite

Answer 12

What do you think? @ganeshie8 I am not fully confident though :)

Answer 13

so ganeshie like a baseball bat and a ball?

Answer 14

yeah but wait, i don't think that should be the case always

Answer 15

yeah, something like this is why I am not confident with my answer.

Answer 16

lol

Answer 17

the objects can travel in the same direction after collision also :

Answer 18

LOL! I googled "Two objects with different masses interact, characterize the forces"

and first link leads to here

Answer 19

google might be making fun of us haha!

Answer 20

ahaha :p but its like we dont know the force or the acceleration so what is the possibility of it being different?

Answer 21

We shouldn't concern about the possible for certain things to happen. we just need to consider cases.

Answer 22

ah

Answer 23

@geerky42 so i found this Rearranging gives the equation: mA ∕ mB = aB ∕ aA

From this equation it appears that the accelerations are equal only when the two masses are equal. Otherwise, for the case where the masses are unequal, there is also a difference in the accelerations.

Answer 24

yeah, that makes sense. However difference in accelerations and masses could wind up to be equal

F = 4kg * 9m/s^2 = 36 N
F = 6kg * 6m/s^2 = 36 N

So even if masses are different, force could be same. hence B instead of A.

Answer 25

Or at least what I believe.

Answer 26

I was thinking the same thing you were thinking sos i agree with you

Answer 27

but what could you say about acceleration

Answer 28

they might be different
they must be different
always the same
or unkown

Answer 29

unknown*

Answer 30

would it be the same as the force question ?

Answer 31

I think so?

Answer 32

Wait, are forces same?

Answer 33

well its the same question just with characterize the acceleration

Answer 34

so id say so

Answer 35

well then id say that would be unknown then aha

Answer 36

I just remembered about formula mA ∕ mB = aB ∕ aA

Answer 37

yes that means if it is equal does it not?

Answer 38

So \(m_Aa_A = m_Ba_B\)

So according to this formula, if masses are different, then accelerations MUST be different.

Answer 39

Acceleration HAVE to be different, so \((ma)_A\) can be equal to \((ma)_B\)

Answer 40

Alrights so if mass different acceleration has to be different that makes sense