Five balls are all at the same height near the surface of Earth. One is dropped from rest but the others are launched horizontally. Using the information given in the table below, state how long it will take for each ball to fall to the ground after being launched. Ignore air drag. Vi (m/s) At (s) Ball 1 0 Ball 2 0.9 M Ball 3 3 3.7 Ball 4 15 Ball 5 23

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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!