# physics

Derive a formula for the maximum speed vmax of a simple pendulum bob in terms of g, the length ℓ, and the maximum angle of swing θmax.
Express your answer in terms of the variables g, l, and θmax.

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1. θ=θ(max) •sin(ωt+α)
dθ/dt =θ(max) •ω•sin(ωt+α)
(dθ/dt)(max) = θ(max)•ω= θ(max)√(g/L)
v(max) =(dθ/dt)(max) •L = L•θ(max)√(g/L)

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2. Elena's answer seems to be incorrect

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3. v max = sqrt( 2gL( 1−cos(θmax) ) )

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4. how to dirive a furmua to find the perimiter of following figures

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