Question: A 4-kg object, which is moving on a smooth horizontal surface with a velocity of 10 m/s in thex-direction, is subjected to a force F

A 4-kg object, which is moving on a smooth horizontal surface with a velocity of 10 m/s in the−x-direction, is subjected to a force F_x which varies with time as shown. Approximate the experimental data by the dashed line and determine the velocity of the object

(a) At t = 0.6 s

(b) At t = 0.9 s.

F, N 240 -t, s 0.2 0.6 0.9 -120

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