1. The problem statement, all variables and given/known data Calculate the maximum speed of 100g pendulum mass when it has a length of 100cm and an amplitude of 50cm. 2. Relevant equations I think that Eg=mgh and Ek=0.5mv^2 are related to this problem. 3. The attempt at a solution I'm not really sure how to start this problem as I don't know how to calculate the height for Eg. However I'm pretty sure that I need to use further on gh=0.5v^2 as mass cancels in this situation. Sorry that I cannot provide a full attempt, but I just don't understand part of the problem. I just tried to solve it again and that what I got: sqrt(g/L) =sqrt(9.8/1) =3.13 v(max)=(.5)(3.13) =1.57 m/s Anything right? Thank you in advance.