An object of mass 0.40 kg attached to the end of a string is whirled around in a horizontal circle of radius 2.0m with a constant speed of 8(ms^{-1}). Calculate the angular velocity of the object
-
A.
0.8rad(s^{-1}) -
B.
2 rad(s^{-1}) -
C.
4 rad(s^{-1}) -
D.
8 rad(s^{-1}) -
E.
16 rad(s^{-1})
Correct Answer: Option C
Explanation
V=rw, 8=2w, w=8/2= 4rad/s