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The angle of rotation of a particle is given as a function of time as `theta = theta_(1) + at + bt^(2)` where `theta_(0)` is initial angular displacement and a and b are constants. If the initial angular velocity is `3 pi` radians per second and after 2 sec angulare velocity is `8 pi` radians per second, then a and b respectively in SI unit are:A. `3 pi, 3pi`B. `3pi, 1.25 pi`C. `1.2pi, 3pi`D. `1.25 pi, 1.25 pi` |
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Answer» Correct Answer - B `omega = (d theta)/(dt) = a + 2bt` `3 pi = a + 2b xx 0` `8 pi = a + 4b` Solving above, we get a and b. |
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