im suppose to do some calculations to prove whether or not the pendulum demonstrates the law of conservation of energy.(adsbygoogle = window.adsbygoogle || []).push({});

mass of pendulum = 240.3g = 0.2403 kg

diamter of pendulum bob = 3.50

initial height of pendulum bob = 48 cm = 0.48 m

length of pendulum string = 2.14 m

time interval of photogate light interruption = 11.8 m/s

so there's position 'A' and position 'B'

for 'A"

Emechanical = Ek + Eg

= (0.5)mv^2 + mgh

= 0 + (0.2403kg)(9.8)(0.48m)

= 1.13J

for 'B'

Emechanical = Ek + Eg

= (0.5)mv^2 + mgh

= (.5)(0.2403kg)(11.8^2) + 0

= 16.73J

i must be missing something (my calculations aint proving anything).. any help will be appreciated!

~Amy

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# Pendulum lab

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