1. The resultant of the three forces shown in figure 1 is a horizontal force. Determine (a) the magnitude of P; (b) the magnitude and sense of the resultant. 1000 N 40 30 12 650 N Figure 1

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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!