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Question

Two blocks are connected by a cord passing over a small frictionless pulley and resting on frictionless planes as shown in the figure. The acceleration of the blocks is:

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A
0.33m/s2
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B
0.66m/s2
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C
1m/s2
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D
1.33m/s2
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Solution

The correct option is D 1.33m/s2
Let Tension in the string is T and acceleration of the system is a
100gsin37oT=100a...(1)
T50gsin53o=50a...(2)
sin53o=4/5,sin37o=3/5
60gT=100a...(3)
and T40g=50a...(4)
from equation (3) and (4)
20g=150aa=2g15=1.33m/s2
256052_280645_ans.png

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