Two fixed frictionless inclined planes making an angle `30^@` and `60^@` with the vertical are shown in figure. Two blocks A and B are planes. What is the relative vertical acceleration of A with respect to B?
A
`4.9ms^(-2)` in horizontal direction
B
`9.8ms^(-2)` in vertical direction
C
zero
D
`4.9 ms^(-2)` in vertical direction
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The correct Answer is:
D
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