Question

The period of a pendulum is the time the pendulum takes to swing back and forth. The function L=0.81t^2 relates the length L in feet of a pendulum to the time t in seconds that it takes to swing back and forth. A convention center has a pendulum that is 80 feet long. Find the period.

I am super duper confused! Can someone please explain what in the world I am supposed to do?

Answer 1

I can't find anything anywhere to help me.

Answer 2

T = 2 pi sqrt (L/g)
if you do physics
I will look at your problem in a second

Answer 3

80 = .81 T^2

T^2 = 98.76

T = 9.94 seconds

Answer 4

Now to check that with physics
g is about 32 ft/s^2

T = 2 pi sqrt (80/32)

T = 9.9346 seconds, close enough

Answer 5

Thank you soooo much Damon!

Answer 6

You are welcome.