posted by charlie .
For a child's swing in lightly damped SHM, I am given the time period and a value for g; (as well as the mass.)
with just these, can i rearrange the equation:
T (4s)= 2pi times sqrt l/g
to calculate the length of the swing?
I believe i have (3.98m), but the question says to ignore the mass of the ropes. I'm worried i should use mass, but it seems uneccessary.
Any help appreciated.