A window repairman picks up one end of a large sheet of glass.A second smaller p

Question

A window repairman picks up one end of a large sheet of glass.A second smaller piece of glass is on top. Us=0.8 and Uk=0.2 A- What is the larges angle that he can tip the large sheetbefore the second sheet slips? B- Once it starts to slide, to what angle must he lower thelarge sheet to stop the smaller one from slipping? Thanks. A window repairman picks up one end of a large sheet of glass.A second smaller piece of glass is on top. Us=0.8 and Uk=0.2 A- What is the larges angle that he can tip the large sheetbefore the second sheet slips? B- Once it starts to slide, to what angle must he lower thelarge sheet to stop the smaller one from slipping? Thanks.

Explanation / Answer

m g cos = frictional force m g sin = gravitational force so = tan    equating anddividing tan = s = .8   and = 38.7 deg when the glass starts to slide tan = k = .2     = 11.3   to stop glass from sliding

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