## momentum

$\lambda=\frac{h}{p}$

Gisela F Ramirez 2H
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

### momentum

If you are given the momentum and mass of an object, and being told that it has the same momentum as a gamma ray. How do you use the momentum and mass to find the velocity of the object? Would it just be the p=mv equation?

emily gao 1C
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

### Re: momentum

so momentum exists even if there's no mass--> E=pc :( i didn't know this either

caseygilles 1E
Posts: 73
Joined: Fri Sep 28, 2018 12:18 am

### Re: momentum

Yes, when given mass of an object as having the same energy as momentum of a gamma ray we must use E=pc to solve for energy. Then we equate this energy of a gamma ray to the kinetic energy of the object, inserting our mass in. KE = 1/2 mv^2. We ca solve for the velocity of the object in this way.