how much work does friction do during the 5 m slide?
20 * 5 = 100 Joules
how much potential energy did it lose
m g *5 sin 37
so
(1/2) m v^2 = m g *5 sin 37 - 100
While a roofer is working on a roof that slants at 37.0 ∘ above the horizontal, he accidentally nudges his 86.0 N toolbox, causing it to start sliding downward, starting from rest.
If it starts 5.00 m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 20.0 N?
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