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Two fixed frictionless inclined planes m...

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 vertical direction.

B

`4.9m^(2)` in horizontal direction

C

`9.8ms^(-2)` in vertical direction

D

Zero

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The correct Answer is:
A
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Knowledge Check

  • A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block ((in kg) is .......... (Take g = 10 m//s^(2) )

    A
    2.0 kg
    B
    4.0 kg
    C
    1.6 kg
    D
    2.5 kg

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