A object is shot vertically upward with an initial speed of 5 km/s . If there is no atmosphere, the max elevation of the object above earth’s surface would be equal to what? A- 1100km B-1300km C-1600km D- 8000km E- 25000km

Q: speed of the object at t = 2.9 s

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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!