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In the ideal atwood machine arrangement ...

In the ideal atwood machine arrangement shown, what is the change in kinetic energy of the system in `(1)/(sqrt2)`second of their motion starting from rest ?

A

`1J`

B

`2J`

C

`4J`

D

`5J`

Text Solution

Verified by Experts

The correct Answer is:
D
Acceleration`=(3g-2g)/(5)=2m//s^(2)` so
`v=2xx(1)/(sqrt2)=sqrt2m//s`
`:.DeltaE=(1)/(2)(2)(sqrt2)^(2)+(1)/(2)(3)(sqrt2)^(2)=5`
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