Pendulum in an accelerated car

[Fu-Kwun Hwang]

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A pendulum is in vertical position when put it in a stopped car.
What will happen when the car start to accelerate with acceleration a?
The car will swing with new equilibrium position. The following applet will show you the case:
You can change the acceleration a and the drag coefficient (assume drag force propotional to velocity put in the oppositive direction)

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[kabton14]

Thanks

[ahmedelshfie]

Hi prof
I have ask about Pendulum in an accelerated car
I'm Want modified first slider from b to theta
For me when drag slider g slider theta change value automatic and give the same of slider g
So what i do i add in FixRel Page this equation cta=a/g; work but no give me what i want help prof
thanks