9) A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until...
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9) A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle 0= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface? 10) Explain why a stone, when thrown on a glass window, smashes the windowpane to pieces, but a bullet from a gun passes through making a clean hole. 11) A block has been placed on an inclined plane with the slope angle of 30 degrees at which the block just begins to slide at a constant speed. What is the coefficient of kinetic energy? 9) A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle 0= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface? 10) Explain why a stone, when thrown on a glass window, smashes the windowpane to pieces, but a bullet from a gun passes through making a clean hole. 11) A block has been placed on an inclined plane with the slope angle of 30 degrees at which the block just begins to slide at a constant speed. What is the coefficient of kinetic energy?
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