How do you solve problems for angular speed and angular momentum?

How do you solve problems for angular speed and angular momentum?

By identifying the correct formula and plugging numbers into that formula.

1. "A torque of 0.15 Nm is applied to an egg beater. If the egg beater starts at rest, what is its angular momentum after 0.60 s?"

What is the relationship between torque and angular momentum? Answer: Torque is the rate of change of angular momentum vs. time.

Thus T = (ang mom)/time or (ang momentum) = torque x time.

"If the moment of inertia of the egg beater is 2.3×10^-3 kg m^2, what is its angular speed after 0.60 s?"
What is the relationship between moment of inertia and angular momentum? Answer: That angular momentum L = I * w where I = moment of inertia and w = angular speed.

So w = L/I

2. Angular momentum is conserved, and L = I * w. So if I is cut in half but I * w is constant, what has to happen to w?