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A steel cable with a radius 2 cm supports a chairlift at a ski area. If the maximum stress is not to exceed `108 N m^(-2)`, the maximam load the cable can supportA. `4pi xx 10^(5)N`B. `4pi xx 10^(4) N`C. `2pi xx 10^(5) N`D. `2pi xx 10^(4)` |
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Answer» Correct Answer - B Here, `r = 2 cm = 2xx 10^(-2) m` Maximum load = Maximum stress`xx`Area of the cross-section `= 10^(8) N m^(-2) xx pixx(2xx 10^(-2)m)^(2)` `= 4 pi xx 10^(4)N` |
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