Question

1) A disk of pizza dough is being tossed and spun about its center. As it spins, it stretches and increases its radius. When this happens, what happens to the rotational velocity?

Group of answer choices:

The rotational velocity stays the same.

The rotational velocity decreases.

The rotational velocity increases.

2) 10 kids are riding on a merry-go-round. The merry-go-round has a radius of 3 m and a mass of 2000 kg, and it is spinning with an angular velocity of 2 rad/s. The kids are riding at the rim of the merry-go-round, and they each have a mass of 30 kg. All of the kids jump radially off the merry-go-round, all at the same time. What would the angular velocity of the merry-go-round be after the kids jump off?

2.9 rad/s

3.2 rad/s

2 rad/s

2.7 rad/s

2.3 rad/s

Answer 1