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Tarzan swings on a 40.0-m-long vine initially inclined at an angle of 30.0° with the vertical....

Tarzan swings on a 40.0-m-long vine initially inclined at an angle of 30.0° with the vertical.

(a) What is his speed at the bottom of the swing if he starts from rest?
m/s

(b) What is his speed at the bottom of the swing if he pushes off with a speed of 3.00 m/s?
m/s

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