A bar made of A-36 steel has the dimensions shown in Fig. 3-22. If an axial force of P 80 kN is applied to the bar, determine the change in its length and the change in the dimensions of its cross section after applying the load. The material behaves elastically. P= 80 kN 50 mm 1.5m P= 80 kN 100 mm

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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!