The front shutter of a kiosk is a uniform rectangular metal plate 2 metres high, hinged to the frame of the kiosk along its top edge. The shutter is divided into two parts halfway up, and the two parts are joined by a hroziontal hinge. When the owner opens the kiosk, she slides the lower edge of the shutter up; this edge has short extensions at each end which fit into vertiacl grooves at each side of the kiosk opening. In this way, when the shutter is open, it makes a shelter for the customers. The coefficient of friction is 0.4. How far must the lower edge be raised for the shutter to stay in place supported only by friction from the groove?
Any help would be much appreciated, been tearing my hair out trying to answer this!!
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- Thread Starter
- 02-02-2017 14:01
- Official Rep
- 04-02-2017 15:43
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Just quoting in Amusing Elk so she can move the thread if needed
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