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Q.

In the arrangement shown, the wedge of length 1 metre is pushed with an acceleration of 103m/ s2 . It is seen that block starts climbing up the smooth incline face of the wedge. find the time taken by the block to reach the top. (g = 10 m/s2)

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a

35sec

b

45sec

c

15sec

d

25sec

answer is A.

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Detailed Solution

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macos⁡30∘−mgsin⁡30∘=m′

a′=15−5=10ms−2

S=12a′t2;1=12(10)t2;t=15sec

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