Question
A pendulum has a mass of 3-kg, a length of 2.2 meter, and swings through a (half) arc of 30 degrees. To the tenth of a Joule, what is its maximum Kinetic Energy?
I just need a very simple, straightforward method of solving this problem. Unfortunately my textbook does a crappy job of explaining this. Thanks
I just need a very simple, straightforward method of solving this problem. Unfortunately my textbook does a crappy job of explaining this. Thanks
Answers
drwls
Its maximum potential energy, refereed to the lowest (maximum kinetic energy) location, is
m g L(1 - cos 30)= 3*(9.8)*(2.2)*0.13397
= 8.7 J
That equals the maximum KE
m g L(1 - cos 30)= 3*(9.8)*(2.2)*0.13397
= 8.7 J
That equals the maximum KE