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Q.

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 maximum load the cable can support is

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a

4π × 105 N

b

4π × 104 N

c

2π × 105 N

d

2π × 104 N

answer is B.

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Detailed Solution

Here, r = 2 cm = 2× 10-2 mMaximum load = Maximum stress × Area of cross section= 108Nm-2×π×(2×10-2m)2= 4π×104 N
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