a force of 15 n is used to lift a 500-g ball from the ground to a height of 1.0 m, when it is let go. what is the speed of the ball when it is let go?
here ,
a = (15-.5*10)/.5 = 10/.5 = 20 m/s^2
velocity = sqrt(2*1* 20) = 6.32 m/s
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