WAEC - Physics (1997 - No. 1)
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
0.8rad\(s^{-1}\)
2 rad\(s^{-1}\)
4 rad\(s^{-1}\)
8 rad\(s^{-1}\)
16 rad\(s^{-1}\)
คำอธิบาย
V=rw, 8=2w, w=8/2= 4rad/s