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7.A ball rolls off the top of a staircase with a horizontalvelocity u m/s. If the steps are h metre high and betre wide, the ball willhit the edge of the nth step.2hua)n2(b) n Lu (c)n- 2hugb2hu2gb(a) n - z-, (d) n= n-hu?gb?

Answer»

the correct option is (a)



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