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# 10.A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30-kg block

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10.A vertical spring with a spring constant of 450 N/m is mountedon the floor. From directly above the spring, which is unstrained, a0.30-kg block is dropped from rest. It collides with and sticks tothe spring, which is compressed by 2.5 cm in bringing the block toa momentary hold.Assuming air resistance is negligible, from what height (in cm)above the compressed spring was the block dropped?