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At a certain instant, a 4.0-kg object is sliding eastward at a speed of 15 m/s, propelled by an eastward force of 35 N. The coefficient of kinetic friction between the object and the horizontal surface it slides on is 0.20. No other horizontal forces act on the object. Assuming all forces remain constant, determine how far the object travels in the next 3.0 s.
The object travels ...........m.
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Net force = ma
35 - uFn = ma
35 - .2(4)(9.8) = 4a
a = 6.79 m/s2
Then apply d = vot + .5at2
d = 15(3) + (.5)(6.79)(3)2
d = 75.6 m
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