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Though I am kind of stuck, i need more things to write about and more equations i can calculate using the pedulum.

all i have so far is

E=mgh

H1=0.145m (90dgrs)

M=0.045kg

E=0.045x9.8x0.145

E=0.063945 J

1/m(v^2)

v^2=0.063945x2/0.045

v=1.685ms^-2

so that's the velocity of my first ball on 90 degrees.

and when that ball hit the ball on the other side went up 0.11m (11cm)

so;

H2=0.11

m=0.045

done same equations as before and got v=1.468ms^-2

so now i can only prove that the velocity changes to 1.468 from 1.685.

and that its inelastic because it changes, if you know what i mean.

i need more things that i can work with, more things i can try and find out with the pendulum. and how can i find out how long it will take before the pendulum will come to rest.

help anyone?