- #1

happyparticle

- 357

- 19

- Homework Statement:
- derivate a cross vectors product

- Relevant Equations:
- d/dt[a * (v x r)] = a (v x r)

Hi,

I need to prove that d/dt[a * (v x r)] = a (v x r) if r,v and a denote the position, velocity and the acceleration of a particle.

I see someone else posted the same question, but I didn't understand the answer.

Actually, I don't know how to derivate a cross vectors product. I'm not even sure where to begin.

This is what I did.

d/dt[a * (v x r)] = da/dt * (v x r) + a (d/dt[(v x r)])

I'm not sure at all about what I did, but anyway I'm stuck here. I'm wondering if you guys can tell me if I'm wrong and some tips about d/dt[(v x r)].

I need to prove that d/dt[a * (v x r)] = a (v x r) if r,v and a denote the position, velocity and the acceleration of a particle.

I see someone else posted the same question, but I didn't understand the answer.

Actually, I don't know how to derivate a cross vectors product. I'm not even sure where to begin.

This is what I did.

d/dt[a * (v x r)] = da/dt * (v x r) + a (d/dt[(v x r)])

I'm not sure at all about what I did, but anyway I'm stuck here. I'm wondering if you guys can tell me if I'm wrong and some tips about d/dt[(v x r)].