A weight of 800 lb is suspended from two cables as shown in the figure. What are the tensions in the two cables, T and T2? (Hint: For the weight to not move(be in equilibrium), the forces in each direction, x and y, must sum to zero. Also, I would suggest that you put the origin of your coordinate system where the weight connects to the two cables and represent the tension in each cable, as well as, the weight as a vector.)

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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!