A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8m/s at 20° below the horizontal. It strikes the ground 3s later. (a) How far horizontally from the base of the building does the ball strike the ground? (b)Find the height from which the ball was thrown. (c) How long does it takes the ball to reach a point 10m below the level of launching? (a) x, = vt = (8.00 m/s)cos 20.0° (3.00 s) = 22.6 m Taki

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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!