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Consider a U- shaped fixed smooth wire over which a bead of mass (m) is thrown with speed v. The bead enters semicircular part at A and leaves at B. What is the magnitude of average force exerted by the bead on the part AB of the wire ?A. `(mv^(2))/(pid)`B. `(2mv^(2))/(pi d)`C. `(4 mv^(2))/(pi d)`D. 0 |
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Answer» Correct Answer - C `vec(F)_(avg) = Delta vec(p) = (2mv)/(Delta t) = (2mv)/(((pi d//2)/(v))) = (4mv^(2))/(pid)` |
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