Four forces are exerted on the object shown in the figure. (Forces are measured in newtons, abbreviated N.) The net force on the object is Fnet = F₁+F₂ +F3 + F₁ = 4.0î N. What are (a) F3 and (b) F? Give your answers in component form. FIGURE P3.44 F₁ F3 5.0 N 6.0 N 20° F₂ X

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!