1. A 7.70 kg block is glued to the top of a vertical spring, with spring constant 640. N/m, compressing it a certain distance. A rope is then tied to the block and pulled upwards with a tension of 640. N. How fast is the block going after it's been pulled upward over a total distance of 1.25 m? (Remember that the block is glued to the spring.)

2.