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In the arrangement shown in figure pulle...


In the arrangement shown in figure pulley and strings are ideal. End A of string connected to pulley `P_(1)` is moved upwards with acceleration `a_(A)=2m//s^(2)` while end B of another string shown in figure is moved up with acceleration `a_(B)=1m//s^(2)`. Block C of mass 1 kg is moving up with accelaration `1m//s^(2)`. If block D to which string are connected are connected symmetrically moves such that its orientations remains same then (assume `g=10m//s^(2))`

A

a. Acceleration of block D is `1//2ms^(2)` upwards

B

b. end A is pulled with force of 22 N.

C

c. mass of block B is `1//2kg`

D

d. acceleration of block B is `7//3m//s^(2)` upwards.

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