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# Form 4 Physics Uniform Circular Motion Questions and Answers

Figure 5 below shows a mass of 200 g connected by a string through a hallow tube to a mass of 0.5Kg. The 0.5kg mass is kept stationary in the air by whirling the 200g mass round in a horizontal circle of radius 1.0metre.
Determine the angular velocity of the 200g mass.

(2m 23s)
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F =mromega^2 =mg
0.2 times 1 times omega ^2 = 0.5 times 10 = 5
W=sqrt(5/0.2) = 5 rad/s.