Homework Help: physics

Posted by Bri on Tuesday, November 21, 2006 at 3:56pm.

Tarzan wights 820N, swings from a cliff at the end of a 20m vine that hangs from a high tree limb and initially makes an angle of 22 degrees with the vertical. Immediately after Tarzan steps off the cliff the tension in the cine is 760N. Choose a coordinate system for which teh x axis points horizontally away form the edge of the cliff and the y axis points up. a) What is the net force acting on Tarzan in unit-vector notation? b)What is the magnitude and dicection of the net force acting on Tarzan? c) What is the magnitde and direction of his acceleration?

first I found the foce of the vine in unit vector notation. And I got 285i + 705j. What would be the other equations I should use to solve all of the problems?

You only need to add the force of gravity, which is - 820 N j:

F=(285i + 705j - 820j) N =

(285i -115j) N

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