66 work is done by the spring and by gravity let

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Unformatted text preview: is done by the spring and by gravity. Let point 1 be where the textbook is released and point 2 be where it stops sliding. since at point 2 the spring is neither stretched nor compressed. The situation is sketched in Figure 6.77. EXECUTE: Figure 6.77 where work.) Then gives measured from the point where the block was released. EVALUATE: The positive work done by the spring equals the magnitude of the negative work done by friction. The total work done during the motion between points 1 and 2 is zero and the textbook starts and ends with zero kinetic energy. (Spring force is in direction of motion of block so it does positive 6.82. IDENTIFY: Apply to the system of the two blocks. The total wo...
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