- #1

Pengwuino

Gold Member

- 4,989

- 16

So the problem is

An unstable particle with a mass of 3.34 x 10^-27kg is initially at rest. The particle decays into two fragments that fly off along the x-axis with velocity components 0.987c and -0.868c. Find the amsses of the fragmments. (Suggestion: Conserve both energy and momentum).

So i setup ymv = ymv (for the second)

I figured out both y's

I then used E=mc^2 to find the rest energy and got like, 3.0x10^-10

I divided that in half and then used (y-1)mc^2 (At this point in the post i realized what i did wrong i hope lol)

to figure out what mass would give 1.5x10^-10

That would give me each mass.... am i correct?

Im re-doing my steps as we spoke so i hope im right :D

*Edit*

Ok so i did still do it wrong... i still need help :)

An unstable particle with a mass of 3.34 x 10^-27kg is initially at rest. The particle decays into two fragments that fly off along the x-axis with velocity components 0.987c and -0.868c. Find the amsses of the fragmments. (Suggestion: Conserve both energy and momentum).

So i setup ymv = ymv (for the second)

I figured out both y's

I then used E=mc^2 to find the rest energy and got like, 3.0x10^-10

I divided that in half and then used (y-1)mc^2 (At this point in the post i realized what i did wrong i hope lol)

to figure out what mass would give 1.5x10^-10

That would give me each mass.... am i correct?

Im re-doing my steps as we spoke so i hope im right :D

*Edit*

Ok so i did still do it wrong... i still need help :)

Last edited: