Thursday, May 8, 2014

conservation of momentum

Suppose two spheres approach each other at 1 m/s from opposite directions. Their total momentum is zero. After the collision, they both zoom off at 1m/s in opposite directions. 
What is their momentum? 
What do you know about the mass of the two spheres? 

56 comments:

Evan L said...

Their momentum is zero and I know nothing about the mass!

Ben S. said...

Well, we can't figure it out because the mass is not given. To find momentum, you need mass and velocity.

Anonymous said...

Ben is right

Leslie K said...

Both spheres momentum is probably about 1m/s. Both spheres have the same mass because if they didn't then the sphere with the greater mass would push the object with less mass in it's own direction.

King of Everything except for the MINIONS said...

What Ben said

Leslie K said...

But we can't know sure what the momentum is because the example only gives speed not velocity.

Griffin M. said...

What the heck idk I don't understand this can you teach us please Mr. Ruby?

Rylan N said...

momentum is zero

Anonymous said...

the momentum is because the example only gives speed not velocity.

Brendan S said...

I don't know.

Samantha L said...

We cant figure it out without mass.

gary said...

We can't figure it out.

Mercedes C. said...

I don't know.

Lauren B. said...

As Ben had said you can't figure it out cause the mass is not given. You need mass and velocity to find momentum.

gary said...

wiithout mass

King Of The Minions said...

We need the mass to solve it.

Mya N said...

Well, we can't figure it out because the mass is not given. To find momentum, you need mass and velocity.

xXTyLeRXx J said...

THERES NO MASS MR RUBY

Anonymous said...

You copied ben please post your own.

Griffin M. said...

NO MASS

Leslie K said...

The momentum stays at zero. Due to the law of conversion of momentum says that the total momentum when two object collide stays the same.

Lauren B. said...

Sorry, their momentum is zero because the law of conservation of momentum says that the total momentum of objects that collide with each other the momentum does not change. So it would be zero as the blog had said. And the mass of the two spheres are the same.

Anonymous said...

OWEN: Zero

Ella T. said...

No mass?

Julia M said...

You can't figure it out because the mass isn't given. You need mass and velocity to figure out momentum.

Anonymous said...

AW MEH GAWD SPHERE CILLISIN IT GUUTA BEH NER MASE
(oh my god sphere collision it's gotta be no mass)

Jacob G said...

There is no mass so we can't find the momentum.

shawn l said...

no mass

Anonymous said...

Since everyone else is saying this, we need the mass or something I'm not really sure.

Sadie F. said...

There is no mass so we can's find the momentum.

Anonymous said...

Theres no mass in the equation.

TylerW said...

No mass and no momentum

Anonymous said...

There is no mass

Anonymous said...

Yeah Ben please post your own.

Anonymous said...

YOU COPIED SOMEONE AND PUT IT INTO YOUR OWN WORDS!!!!!!!!!!!!!

Kaylee H. said...

no mass

Anonymous said...

qwertyuiop

Anonymous said...

you can not tell the mass
loganm

Cassie :D said...
This comment has been removed by a blog administrator.
Alysse S said...

No mass and no momentum

Anonymous said...
This comment has been removed by the author.
Anonymous said...

No mass and no momentum

Sophia S:) said...

Mass is equal between the two spheres.

Cassie :D said...

The mass is the same, and the momentum is 0.

Adrian K said...

The mass is the same and no momentum.

AutumnP said...

The mass would be the same with no momentum.

Kanani L. said...

Zero

McKayla. M said...

The mass is the same without momentum

Abbie N said...

The mass would be the same without any amount of momentum.

lindseyb said...

The spheres have the same mass, and the momentum is zero

Jacob L said...

Their mass is the same because they both hit each other and go the same distance and same speed

Molly B said...

The mass is the same, and the momentum is 0.

Marie R. said...

It's 0.

Gavin MacDonald said...

0

Unknown said...

its 0

Anonymous said...

is nothingness a kind of matter