1. The problem statement, all variables and given/known data Betty weighs 427 N and she is sitting on a playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and releases it when the seat is 0.88 m above the ground. The acceleration of gravity is 9.8 m/s2 . How fast is Betty moving when the swing passes through its lowest position? Answer in units of m/s. 2. Relevant equations KE=1/2 M V^2 PEg=Mgh i might be missing an equation here 3. The attempt at a solution i was thinking that potential energy gravitational would turn into Kinetic energy then i solved for v. PEg= 427 newtons*.66 i used the change in height for h and got 281.82 Joules for my answer. then i said that should transfer to KE. 281.82 joules= 1/2* 427/9.8 Kg * V^2 and i got 11.3737 m/s as my answer. when i checked this it turned out to be wrong. i think i may have to apply circular motion concepts to this problem, but i'm not quite sure how to do that. thanks in advance.