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A block is kept on a frictionless inclin...

A block is kept on a frictionless inclined surface with angle of inclination `alpha`. The incline is given an acceleration ‘a’ to keep the block stationary. Then 'a' is equal to

A

`(g)/(tan alpha)`

B

`g "cosec "alpha`

C

g

D

`g tan alpha`

Text Solution

Verified by Experts

The correct Answer is:
D
`ma cos alpha=mg sin alpha`
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NARAYNA-LAW OF MOTION-EXERCISE - II (C.W)(OBJECTS SUSPENDED BY STRINGS AND APPARENT WEIGHT)
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  11. In the following figure, the pulley is massless and frictionless. Ther...

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  16. Two masses of 10 kg and 5 kg are suspended from a rigid support as sho...

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  19. If m(1) = 10kg, m(2)= 4kg, m(3)= 2kg, the acceleration of system is

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