Answer:
t=1.87s
b. 9.74
Explanation:
First to find time set an equation for angular velocity:
Now to find the angle:
Starting from rest, the disc completes revolutions after seconds according to
with angular acceleration . It completes 10 rev in 2 s, which means
Find the time it takes to complete 20 rev with this acceleration:
so it takes approximately 0.83 s to complete 10 more rev.
Orbital periods of stars in the Galaxy
Answer: True.
Explanation:
You would be able to visualize the basketballs height going up and when it sinks down into the hoop.