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While a roofer is working on a roof that slants at 45.0 ∘∘ above the horizontal,...

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Physics

While a roofer is working on a roof that slants at 45.0 ∘∘ abovethe horizontal, he accidentally nudges his 90.0 NN toolboxes,causing it to start sliding downward, starting from rest.

a)If it starts 4.70 mm from the lower edge of the roof, how fastwill the toolbox be moving just as it reaches the edge of the roofif the kinetic friction force on it is 19.0 NN ?

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Hopethis    See Answer
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