Angular momentum calculations

A 0.10kg ball is thrown with a speed of v=2.0 at a resting stick that can rotate around one end at axis O. The ball hits the stick at r=1.5m from O as shown below. What is the angular momentum of the ball about axis O before hitting the stick? Answer using a coordinate system where counterclockwise is positive.

-.30

A 0.25kg ball is thrown with a speed of v=4.5 at a resting stick that can rotate around one end at axis O. The ball hits the stick at r=0.75 from O as shown below. What is the angular momentum of the ball about axis O before hitting the stick? Answer using a coordinate system where counterclockwise is positive.

-0.84

A disk with rotational inertia of 0.75kg rotates clockwise with an angular speed of 15 about its center. What is the angular momentum of the disk about its center? Answer using a coordinate system where counterclockwise is positive.

-11

A ball with rotational inertia of 1.5kg rotates clockwise with an angular speed of 16 about its center. What is the angular momentum of the ball about its center? Answer using a coordinate system where counterclockwise is positive.

-24

A 0.15kg ball is thrown with a speed of v=5.0 at a resting stick that can rotate around one end at axis O. The ball hits the stick at r=0.50 from O as shown below. What is the angular momentum of the ball about axis O before hitting the stick? Answer using a coordinate system where counterclockwise is positive.

0.38

A ball with rotational inertia of 0.50kg rotates counterclockwise with an angular speed of 10 about its center. What is the angular momentum of the ball about its center? Answer using a coordinate system where counterclockwise is positive.

5

A disk with rotational inertia of 0.75kg rotates counterclockwise with an angular speed of 10 about its center What is the angular momentum of the disk about its center? Answer using a coordinate system where counterclockwise is positive.

7.5