Two blocks of masses 10kg and 20kg are connected by a light string passing over a frictionless pulley as shown in the figure, the angle of inclination is 30∘. If the system is released, the blocks move with an acceleration of
A
g2m/s2
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B
g4m/s2
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C
g6m/s2
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D
g8m/s2
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Solution
The correct option is Ag2m/s2 Using FBD of the masses
T−10gsin30∘=10a...(1) 20g−T=20a...(2) Solving (1) and (2) to get the value of acceleration a ⇒30a=20g−5g a=15g30=g2m/s2