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InterviewSolution
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The velocity- time graph of the figure shown the motion of a wooden block of mass `1 kg` which is given an intial push at `t = 0` along a horizontal table. A. The coefficient of friction between the block and the table is `0.1`B. The coefficient of friction between the block and the table is `0.2`C. If the table was half of its present roughness, the time taken by the book to complete the journey is `4 s`D. If the table was half of its present roughness, the time taken by the book to complete the journey is `8 s` |
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Answer» Correct Answer - A::D `a = "slop of" v = t "graph"` `= - 1 m//s^(2)` `:. "Retardation" = 1 m//s^(2) = (mu mg)/(m) = mu g` or `mu = (1)/(g) = (1)/(10) = 0.1` If `mu`is half ,then reladation a is also half .So using `v =u - at` or `0 = u - at` or `t = (u)/(a)` or `t prop (1)/(a)` we can see that `t` will be two times. |
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