A horizontal force of 200 N is applied to a 55.0-kg cart across a 15.0-m level surface. If the cart accelerates at 2.0 m/s2, then what is the work done by the force of friction as it acts to retard the motion of the cart?
a. –4.7E+3 J
b. –1.4E+3 J
c. –3.0E+3 J
d. –9.0E+1 J
e. –3.1E+2 J
b
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