Do your physics moodle quiz!!
http://moodle.hci.edu.sg/ -> login with your y10hcixxxx and pass is your nric
-> Physics -> C1 Physics Course 2010 -> HC Physics 2010/11 -> look on the right and click Circular Motion Lecture Quiz 1 (Quiz closes)
0.24 x 106 rad
94 rad s-1
1.99 x 10 -7 rad s -1
The momentum of the object varies but its speed is constant.
Anyway, it's participation marks only, the marks itself do not count.