posted by zheane on .
A flight attendant pulls her 70 N flight bag a distance of 253 m along a level airport floor at a constant speed. The force she exerts is 40 N at an angle of 53° above the horizontal
A) Find the work that she does on the flight bag
B) Find the work done by the force of friction on the bag
A) 40 cos53*253 = 6090 J
B) All of her work is done against friction. Friction does -6090 J