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PhysicsQ&A Library*32. A 10-kg block rests on a table for which the coefficient of static friction between the block and the tabletop is exactly 0.4. The block is connected to a knot by a horizontal string. Another block hangs from the knot, and another string goes up at an angle 30° to a wall, as shown at right. How large can the mass m be before the 10-kg block begins to move to the right? 30° 10 kg mQuestion

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