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A spring with force constant 720 N/m has one end attached to a wall. A 5.00 kg block on the floor is pushed against the spring, compressing it 5.00 cm. The block is released from rest and moves away from the wall. Friction between the block and the floor can be neglected. What is the speed of the block after it leaves the spring?
(a) 0.300 m/s
(b) 0.600 m/s
(c) 0.720 m/s
(d) 0.960 m/s
(e) 1.20 m/s
(f) none of the above answers
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