There object, `A` : (a solid sphere), `B` : (a thin circular disk) and `C` : (a circular ring), each have the same mass `M` and radius `R`. They all spin with the same angular speed `omega` about their own symmetry axes. The amount of work `(W)` required ot bring them to rest, would satisfy the relationA. `W_A gt W_C gt W_B`B. `W_C gt W_B gt W_A`C. `W_B gt W_A gt W_C`D. `W_A gt W_B gt W_C`

There object, `A` : (a solid sphere), `B` : (a thin circular disk) and

1.	There object, `A` : (a solid sphere), `B` : (a thin circular disk) and `C` : (a circular ring), each have the same mass `M` and radius `R`. They all spin with the same angular speed `omega` about their own symmetry axes. The amount of work `(W)` required ot bring them to rest, would satisfy the relationA. `W_A gt W_C gt W_B`B. `W_C gt W_B gt W_A`C. `W_B gt W_A gt W_C`D. `W_A gt W_B gt W_C`
Answer» Correct Answer - B (b) Using work energy theorem `W = Delta K = (1)/(2) I omega^2` `W prop I` `W_A : W_B : W_C = (2)/(5) MR^2 : (1)/(2) MR^2 : MR^2` `W_A : W_B : W_C = (2)/(5) : (1)/(2) : 1` Hence `W_C gt W_B gt W_A`.

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