I drag a mass m=21 kg in a straight line, along a horizontal surface, a distance D=23 m . I drag it at constant speed v=0.90 m.s−1 in a straight line using a horizontal force. The coefficients of friction are k1= 1.2μ
k2 = 1.1μ
k
=1.1. How much work do I do? W = ____ J .
Tell us which equations you think might be relevant here. For example don't key words in you make you think of an equation which covers force, distance and work. Then think how to build in the friction factor (no, not me)