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Question

Figure shows two blocks, each of mass m. The system is released from rest. If accelerations of blocks A and B at any instant (not initially) are a1 and a2, respectively, then
981445_3233f2826aa34214bd286b3b023727e0.png

A
a1=a2cosθ
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B
a2=a1cosθ
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C
a1=a2
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D
None of these
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Solution

The correct option is C None of these
Let the velocity of A be v1 and velocity of B be v2
since velocity at every point of string must be equal
v1=v2cosθ ...........(1)
Differentiating equation (1) we get
a1=a2cosθ

1141896_981445_ans_a7582a7df99d44f4bfb2363c00fe314e.png

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