A circular disc of Moment of inertia 0.5 kg m 2 and radius 0.2 m has a weightless string…
Physics · JEE Advanced · NTA Exams — Rotational Motion
A circular disc of Moment of inertia 0.5 kg m2 and radius 0.2 m has a weightless string passing around its rim. The string is pulled down by a force F and it acquires an angular speed of 5 revolution per second in 5 sec. The force F is
- 5 pN
- 4 pN
- 2.5 pN
- 2 pN
Answer
(A) 5 pN
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