I have to plan and complete an investigation on calculating the acceleration of an object due to the force of gravity. The investigation plan sheet calls for the use of a pendulum, measuring the period of a number of oscillation then using the formula T2 = 4 pi2 length / gravity. I'm confused because I was certain this formula finds the length of the pendulums string, not the average time of each oscillation or the affects gravity has on the acceleration of the bob. Can someone help me see the link? I'm completely confused :S

Question

anonymous · Answer

if you know the length and you measure the time of oscillation, then you can compute 'g'.

anonymous · Answer

$$T^{2}=(4\pi^{2}l )\div g$$

anonymous · Answer

Which is right and you can use the formula if needen