You are at a furniture store and notice that a Grandfather clock has its time re

Question

You are at a furniture store and notice that a Grandfather clock has its time regulated by a physical pendulum that consists of a rod with a movable weight on it. When the weight is moved downward, the pendulum slows down; when it is moved upward, the pendulum swings faster. If the rod has a mass of 1.23 kg and a length of 1.25 m and the weight has a mass of 1.78 ? kg, where should the mass be placed to give the pendulum a period of 2.00 seconds? Measure the distance in meters from the top of the pendulum.

Explanation / Answer

Time period of pendulum

T = 2 (l/g)

where l=length of the pendulum

g=acceleration due to gravity9.8 m/s^2

==>2 = 2 (l/9.8 )

l 1 m...............ANS

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