Two particle are initially moving with angular momentum `vec(L)_(1)` and `vec(L)_(2)` in a region of space with no external torque. A constant external torque `vec( tau)` then acts on one particle, but not on the other particle, for a time interval `Delta t`. What is the chargne in the total angular momentum of the two particles ?

Options

A. `vec( DeltaL) = vec( L)_(1) - vec(L) _(2)`
B. `vec( DeltaL) = (1)/(2)(vec( L)_(1) - vec(L) _(2))`
C. `vec(Delta L) = vec( tau) Delta t `
D. `vec( Delta L)` is not applicable for this system

Answer

C