- Joined
- Apr 11, 2014
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Hello,
I have some conflicting sources on the maximum force of a pendulum. TBR physics, on chapter of periodic motion, page 229, says the max force occurs when the bob is straight down, but Chad's Videos says when the bob is straight down the force is zero. Can someone explain to me when the max force is on a pendulum and whether which of these sources is correct?
I am leaning towards Chad being correct and because on the next page of TBR, it shows that the acceleration is max when the bob is at its maximum displacement from equilibrium; thus, if acceleration is max then that also means the force is max.
Also, how does the PEpendulum = - mgL (1-cos theta), can't we just use PE= mgh?
TBR in the wrong here or am I mixing some concept up? Thank you for any help.
I have some conflicting sources on the maximum force of a pendulum. TBR physics, on chapter of periodic motion, page 229, says the max force occurs when the bob is straight down, but Chad's Videos says when the bob is straight down the force is zero. Can someone explain to me when the max force is on a pendulum and whether which of these sources is correct?
I am leaning towards Chad being correct and because on the next page of TBR, it shows that the acceleration is max when the bob is at its maximum displacement from equilibrium; thus, if acceleration is max then that also means the force is max.
Also, how does the PEpendulum = - mgL (1-cos theta), can't we just use PE= mgh?
TBR in the wrong here or am I mixing some concept up? Thank you for any help.