Physics 12 - Quiz 2


Swinger

Solution:

a) Free body diagram

b) The net force acting on the object must be the x-component of  tension, Tx , since it is clearly the only unbalanced force and it points towards the center of the circular path. Furthermore the value of Ty must equal the value of weight, W, since the object is in translational equilibrium vertically. Writing these two statements yields the following,

The value of T can be calculated since , m, and g are all known quantities,

We can now easily calculate the magnitude of the net force, Tx

 

c) The period of revolution can now be determined given the value of the net force (which is the centripetal force)  calculated above,

 
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