3.A block of 3kg rests in limiting equilibrium on an inclined plane of inclination 30degrees. If the inclination of the plane is increased to 60degree ,the minimum force along the plane required to keep it stationary

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Q. A body of

6 k g

rests in limiting equilibrium on an inclined plane whose slope is

30^{o}

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60^{o}

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A block of mass M is resting on an inclined plane as shown in the figure. The inclination of the plane to the horizontal is gradually increased. It is found that when the angle of inclination is $θ$ , the block just begins to the slide down the plane. What is the minimum force F applied parallel to the plane that would just make the block move up the plane?

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