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A force F is applied to a system of ligh...

A force `F` is applied to a system of light pulleys to pull body `A`. If `F` is `10 kN` and block of mass `A` has a mass of `5xx10^(3)kg`, what is the speed of `A` after `1 s` starting from rest? Assume no friction.

A

`4ms^(-1)`

B

`8ms^(-1)`

C

`6ms^(-1)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Net force on A

`F_A=4(F/2)=2F=2xx10=20kN`
`"Acceleration" a=F_A/m=(20xx10^3)/(5xx10^3)=4m//s^2`
`v=u+at=0+4xx1=4m//s`
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