Period of a Pendulum

 

- determined by  ....

 

Length

 

T = 1/f

 

 

Finding the height of a pendulum
from a pendulum angle

 

 

 

 

 

 

KE1 + PE1 = KE2 + PE2

 

Ex) A pendulum is pulled back at an angle of 10 degrees from the vertical and is released. When the ball reaches the lowest point, it has a velocity of 2 m/s.

 

What is the frequency of the pendulum?

 

KE1 + PE1 = KE2 + PE2

 

mgh = = 1/2mv2

 

mg(L - Lcosq) = 1/2mv2

 

 

 

L = 13.2 m

 

 

 

T = 7.2 sec

 

T = 1/f

 

 

T = .14 Hz

 

 

Giancoli p. 317) 2, 3, 5, 8, 28, 30, 32

 

 

 

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