JEE Main 2022 Physics question
A string of area of cross-section 4 and length 0.5 m is connected with a rigid body of mass 2 kg. The body is rotated in a vertical circular path of radius 0.5 m. The body acquires a speed of 5 m/s at the bottom of the circle. Strain produced in the string when the body is at the bottom of the circle is . (use young's modulus and g = 10 )
Answer: 30
Solution
At the bottom the tension is T = mg + 25/0.5 = 120 N. The strain
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