a ball is dropped from a building of the height 90 m. simultaneously another ball is thrown up with a speed of 40 m/s. Calculate the relative speed of the ball as a function of time
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In motion under gravity, if the ball is released or dropped that means its initial velocity is zero. In this problem as ball is dropped, so its initial velocity will be taken as zero. We will apply kinematic equations.
Important point: Sign Convention:
Any vector quantity directed upward will be taken as positive and directed downward will be taken as negative.
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