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Q.

As per given figure, a weightless pulley P is attached on double inclined frictionless surfaces. Two blocks of masses 4kg and 1kg connected as in figure.The tension in the string (massless) will be (if g=10m/s2 )
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a

4(3−1)N

b

4(3+2)N

c

4(3+1)N

d

4(3−2)N

answer is A.

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Detailed Solution

 Question Image
 ⇒4gsin60°−T=4a⇒T−gsin30°=a
After solving above two equations
T=4(3+1)N 

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