Question

A wire can sustain the weight of $$40kg$$ before breaking. If the wire is cut into 4 equal parts, each part can sustain a weight of _____ kg.

A
40
B
160
C
10
D
20

Solution

The correct option is D $$40$$Since we know that, Breaking Stress is a material Property and independent of length, therefore even after cutting the wire into four equal parts the stress required for all would be the same as the cross section of the wire remains unchanged. Physics

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