A flight attendant pulls her 70.0 N flight bag a distance of 269 m along a level airport floor at a constant speed. The force she exerts is 32.0 N at an angle of 52.0° above the horizontal.(adsbygoogle = window.adsbygoogle || []).push({});

(a) Find the work she does on the flight bag.

_5299_J

(b) Find the work done by the force of friction on the flight bag.

____J

(c) Find the coefficient of kinetic friction between the flight bag and the floor.

_____

i found (a) by using W=fdCos, 32.0 x 269 x Cos(25) = 5299 J

but for part (b) and (c) i cannot understand what formula to use or how to find an answer for that matter

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# What is the work done by friction?

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