10.6 Collisions of Extended Bodies in Two Dimensions

A box with a mass of 2.0 kg rests on one end of a seesaw. The seesaw is 6.0 m long, and we can assume it has negligible mass. Approximately what angular momentum will the box have if someone with a mass of 65 kg sits on the other end of the seesaw quickly, with a velocity of 1.2 m/s?

1. 702 kg•m²/s
2. 39 kg•m²/s
3. 18 kg•m²/s
4. 1.2 kg•m²/s

A cyclist pedals to exert a torque on the rear wheel of the bicycle. When the cyclist changes to a higher gear, the torque increases. Which of the following would be the most effective strategy to help you determine the change in angular momentum of the bicycle wheel?

1. multiplying the ratio between the two torques by the mass of the bicycle and rider
2. adding the two torques together, and multiplying…

Why is it important to consider the shape of an object when determining the object's angular momentum?

1. The shape determines the location of the center of mass. The location of the center of mass in turn determines the angular velocity of the object.
2. The shape helps you determine the location of the object's outer edge, where rotational velocity will be greatest.
3. The shape helps you determine the l…

Describe a rotational system you could use to demonstrate the effect on the system's angular momentum of applying different amounts of external torque.

Repeat the example in which the disk strikes and adheres to the stick 0.100 m from the nail.

Repeat the example in which the stick is free to have translational motion as well as rotational motion.