vertical circular motion

[gusty comet]

any clue on how to do part ii?

[obsidian elk]

Is this related rates?

[gusty comet]

no differentials required if thats what you meant

should only require kinetic energy and circular motion equations but I don't see it personally

[obsidian elk]

Well you can use s=rtheta to write the equation

[gusty comet]

wdym by that

[obsidian elk]

Ok so they mean by v^2 as the liner speed?

[gusty comet]

yh

[obsidian elk]

I think you can use s=rθ to write the equation for linear motion

[gusty comet]

i dont see how that would help us

we'd want to form an equation with a sin(theta) rather than a theta

[obsidian elk]

What is R?

[gusty comet]

25?

[obsidian elk]

Oh radios Ok

[obsidian elk]

I don't know if this would help but can't we say that the v=s/t where s is the arc length then say v=(rθ)/t then substitute for r v=(mg(3sinθ+5)θ)/t?