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A small bell starts moving from A over a...

A small bell starts moving from `A` over `a` fixed track as shown in the figure . Surface `AB` is friction from `A` to `B` the bell roll ralis without sipping `BC` is friction , `K_(A)K_(B)` and` K_(C)` are kinetic energy of the bell at `A, B` and `C` respacecvely.Then

A

`h_(A) gt h_(c), K_(B) gt K_(C)`

B

`h_(A) gt h_(c ), K_(C) gt K_(A)`

C

`h_(A)= h_(c ), K_(B) = K_(C)`

D

`h_(A) lt h_( c), K_(B) gt K_(C)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
Since work is being done in the process, the sum of kinetic energy, translational kinetic energy, rotational kinetic energy and potential energy will be constant.
`KE_(A) + mah_(A) = KE_(B) = KE_(C) + mgh_(C)`
`KE_(B) gt KE_(A)` and `KE_(B) gt KE_(C)`
Now, if `h_(C) gt h_(A)`, then `KE_(A) lt KE_(C)`.
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