A ball on the end of a string swings
in a horizontal circle once every
second. Which of the following
quantities are zero?
The ball's
1. Velocity
2. Angular velocity
3. Centripetal acceleration
4. Angular acceleration
5. Tangential acceleration
6. None of these are zero
a) 1, 2, and 3
b) 2
c) 4 and 5
d) 6