Question Solved1 Answer A) A 2 kg metal plate slides down a 21-meter high slope. At the bottom its speed is 7 m/s. To the nearest Joule, what was the magnitude of the work done by friction? B) If the slope in the above problem is 43 degrees, what is the coefficent of friction (to 2 decimal places)?

YUHKCZ The Asker · Physics

A) A 2 kg metal plate slides down a 21-meter high slope. At the bottom its speed is 7 m/s. To the nearest Joule, what was the magnitude of the work done by friction?

B) If the slope in the above problem is 43 degrees, what is the coefficent of friction (to 2 decimal places)?

Transcribed Image Text: A) A 2 kg metal plate slides down a 21-meter high slope. At the bottom its speed is 7 m/s. To the nearest Joule, what was the magnitude of the work done by friction? B) If the slope in the above problem is 43 degrees, what is the coefficent of friction (to 2 decimal places)?
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Transcribed Image Text: A) A 2 kg metal plate slides down a 21-meter high slope. At the bottom its speed is 7 m/s. To the nearest Joule, what was the magnitude of the work done by friction? B) If the slope in the above problem is 43 degrees, what is the coefficent of friction (to 2 decimal places)?
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a) from conservation of Enersy{:[mgh=(1)/(2)mv^(2)+w_(f)],[2xx9.8 xx21=(1)/(2)xx2xx7^(2)+w_(f)],[w_(f)=2xx9.8 xx21-7^(2)]:}Woik done ly w_(f)=362.6J fric ... See the full answer