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The height and width of each step of a staircase are 20cm and 30cm respecively.ball rolls off the top of a stair with horizontal velocity v and hits the fifth step. inemagnitude of v is (g 10 ms)1)1.5 v5. ms ! 2)3/5 ns-1-23) 7.5 ms14) 1.5 ms |
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