Answer :
The rate of chage of angular momentum = the net torque on the object.
The net torque is the weight "mg" times the perpendicular distance from the line of action of the weight to the origin, x
dL/dt = mgx = mgrCos(36.8)
Or it is the component of the weight perpendicular to the position vector, mgCos(36.8) , times the magnitude of the position vector, r ;
dL/dt = {mgCos(36.8}]r
Obviously the same eq.
Everything is given, so just plug in the values. The particle velocity is not needed to find rate of change of L.
The net torque is the weight "mg" times the perpendicular distance from the line of action of the weight to the origin, x
dL/dt = mgx = mgrCos(36.8)
Or it is the component of the weight perpendicular to the position vector, mgCos(36.8) , times the magnitude of the position vector, r ;
dL/dt = {mgCos(36.8}]r
Obviously the same eq.
Everything is given, so just plug in the values. The particle velocity is not needed to find rate of change of L.