A spring with a force constant of 150N/m is used to push a 0.30kg block of wood against a wall.?
Find the minimum compression of the spring needed to keep the block from falling, given that the coefficient of static friction between the block and the wall is 0.50. Does this answer change if the mass of the wood block is doubled? Why?
Since 0.30 kg * 9.8 is 2.94, plus 0.5 for the force of friction, the force needed is 3.44 N. So 3.44 N / 150N/m is 0.023 m, or 2.3 cm.
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