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Q.

Figure shows two blocks A and B connected to an ideal pulley string system. In this system when bodies are released then :

(neglect friction and take g=10 m/s2)

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a

Acceleration of block A is 2 m/s2

b

Tension in string connected to block B is 80 N

c

Acceleration of block A is 1 m/s2

d

Tension is string connected to block B is 40 N

answer is B, D.

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Detailed Solution

aB=4aA,T=10aB.......1

40g−4T=40aA.......2

From (1) and (2)

40g=410×4aA+40aA⇒400=200aA

⇒aA=2m/s2

T=80N.

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