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July 7, 2015

Homework Help: Physics

Posted by Shawna on Wednesday, November 4, 2009 at 2:10pm.

A 3.0 kg breadbox on a frictionless incline of angle еш = 42 вк is connected, by a cord that runs over a pulley, to a light spring of spring constant k = 110 N/m, as shown in the figure. The box is released from rest when the spring is unstretched. Assume that the pulley is massless and frictionless. (a) What is the speed of the box when it has moved 9.0 cm down the incline? (b) How far down the incline from its point of release does the box slide before momentarily stopping, and what are the (c) magnitude and (d) direction (if up the incline then type 1, if down the incline then type 2) of the box's acceleration at the instant the box momentarily stops?

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