Saved Bookmarks
| 1. |
An agent applies force of constant magnitude `F_(0)` always in the tangential direction as shown in the figure`-3.77`. Find the speed of the bob when string becomes horizontal, assuming that it is at rest at its lowest point: A. `sqrt((l)/(m) (pi F_(0) - 2 mg))`B. `sqrt(lg)`C. `sqrt((l)/(m) (pi F_(0)) - 4 gm)`D. `sqrt((l)/(m) F_(0))` |
|
Answer» Correct Answer - A `W = Delta KE` `- mgl + F_(0) xx l (pi)/(2) = (1)/(2) mv^(2) - 0` `sqrt(-2gl + (F_(0)pi1)/(m)) = v` |
|