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ok could someone plesae help me with this question

I had to draw a pendulum and the questions asks what is the length of the pendulum if the period is .75 s so i got .142 m then it asks what is the speed of the pendulum at the bottom of its swing if the angle that makes its maximum displacement is 11 degrees? wow do i do that... I have no idea?????

PLEASE HELP!!!!!!!!

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# Draw a pendulum

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