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**1. The problem statement, all variables and given/known data**

Consider a particle confined to move inside a frictionless spherical shell on its surface and in the presence of gravity.

compute the angular momentum (in spherical co-ordinates) about the center of the spherical shell

**2. Relevant equations**

L=r x p

**3. The attempt at a solution**

l=m*(x,y,z) x (dx/dt,dy/dt,dz/dt) , i was going to differentiate the spherical coordinates by t and plug it in but stopped because im pretty sure what im doing is wrong