If an object is thrown up it comes back by a curved angle . Why is it so ?
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The main concept needed to grasp this problem is the idea that horizontal motion and vertical motion can be treated separately since they are perpendicular. The object dropped has the same initial vertical velocity as the object thrown horizontally (assuming it is thrown perfectly horizontally). Since both objects begin to accelerate downwards from a starting velocity of zero they will hit the ground at the same time as they are experiencing the same acceleration. In summary, vertical motion is independent of horizontal motion, so provided the objects have the same initial vertical velocity they will take the same amount of time to travel to the ground provided they start at the same height of course.
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