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The velocity-time graph of a body is given below. Find the average velocity from `t = 0` to `t = 40 s`. A. `20 m//s`B. `40 m//s`C. `50 m//s`D. `60 m//s` |
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Answer» Correct Answer - A Displacement = area upto `t = 40 s` =`(1)/(2) xx 20 xx 20 +(30 - 20) xx 20` `+ (1)/(2)[20 + 60][40 - 30] = 800 m` :. `v_(av) = ("Displacement")/("time") = (800)/(40) = 20 m//s`. |
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