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September 20, 2014

Homework Help: Physics

Posted by Einstein on Friday, November 16, 2007 at 5:31pm.

An archer puts a 0.28 kg arrow to the bow string. An average force of 200 N is exerted to draw the sting back 1.1 m. a) Assuming no frictional loss, what speed does the arrow leave the bow? b) If the arrow is shot straight up, how high does it rise?

My thoughts: KE = 1/2mv^2. You are given mass but how do you find velocity? Once velocity is given KE = PE = mgh.

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