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What should be the minimum force P to be...

What should be the minimum force P to be applied to the string so that block of mass m just begins to move up the frictionless plane?

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Verified by Experts

From force diagram of pulley.
`P+P cos theta=T`
From force diagram of block
`T gt mg sin theta`
or ` P+P cos theta gt mg sin theta`
or `P gt(mg sin theta)/(1+ cos theta)`
`:. P_(min)=(mg sin theta)/(1+cos theta)`
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CENGAGE PHYSICS ENGLISH-NEWTON'S LAWS OF MOTION 1-Exercise 6.2
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  4. In fig. the block of mass M is at rest on the floor . At what accelera...

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  6. Three blocks m(1), m(2), and m(3) are arranged as shown in fig. if m(...

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  7. A block of mass m is placed on an inclined plane. With what accelerati...

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  13. A locomotive accelerates a train of identical railway carts. The carts...

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  14. A uniform string of length 10m and mass 20 kg lies on a smooth frictio...

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  15. A man of mass m stands on a platform of equal mass m and pulls himself...

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  16. A small cubical block is placed on a triangular block M so that they t...

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  17. A block of mass 1kg is kept on the tilted floor of a lift moving down ...

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  18. Two particles of mass m each are tied at the ends of a light string of...

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  19. A block of weight W is placed on a wedge and arranged as shown in fig....

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  20. A steel ball is suspended from the ceiling of an acceleration carriage...

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