The work done to stretch a wire through `1xx10^(-3)m` is 2J. Then the work done to stretch another wire of same material having half length and double

Question

The work done to stretch a wire through `1xx10^(-3)m` is 2J. Then the work done to stretch another wire of same material having half length and double

The work done to stretch a wire through `1xx10^(-3)m` is 2J. Then the work done to stretch another wire of same material having half length and double the area of the cross section by `1xx10^(-3)m` is,
A. `1//4` J
B. 4 J
C. 8 J
D. 16 J

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
`(W_(2))/(W_(1))=(F_(2)l_(2))/(F_(1)l_(1))=(2xx2)/(1xx1)`
`therefore W_(2)=W_(1) xx 4=4xx2=8J`.

5 views Answered 2023-02-05 15:29