Example 2 V = 600 m? m = 500K g. Pair = 1.3 Kg/m² Aerostat The air resistance is negligible The aerostat is moving up wit constant acceleration Calculate the altitude of the aerostat at t = 10s FA – mg = ma pgV - g = 5.6 m/s² FA m m at2 h = = 280 m 2 || to

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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!