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 Form 4 Physics Uniform Circular Motion Questions and Answers

Figure 15 shows two masses 0.1kg and 0.2kg connected by a string through a hole on a smooth horizontal surface.
Figure15432020520.png
The 0.1kg mass rotates in a horizontal circle of radius 3cm.Calculate the angular velocity of the mass when the
system is in equilibrium. Use acceleration due to gravity g =10m/s2.
(KCSE 1999 paper question 31.)

 (3m 32s)
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Answer Text:
Tension = centripetal force, #T=m omega 2r rightarrow 2# #= 0.1 times omega ^2 times 0.03#
W = 25.82 rad/s


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