A steel ring of radius r and cross sectional area 'A' is fitted on to a wooden disc of…
General Studies · SRM · NTA Exams — SRMJEE 2019 Official Syllabus
A steel ring of radius r and cross sectional area 'A' is fitted on to a wooden disc of radius R (R > r). If the Young's modulus be Y, then what is the force with which steel ring is expanded?
- \(\frac{A Y R}{r}\)
- \(\frac{A R}{Y_{r}}\)
- \(\frac{A}{Y}\left(\frac{r}{R-r}\right)\)
- \(A Y\left(\frac{R-r}{R}\right)\)
Answer
(D) A Y ( R-r R )
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