1. a 5.0 kg block is held against a horizontal (well anchored) spring with spring constant 200 n/m. the spring is compressed (with the block in contact with it) and then released to launch the block horizontally. the horizontal surface below the block is not frictionless; the coefficient of friction between the block and surface is 0.30. after the block is no longer in contact with the spring, it continues sliding for 3.0 m before coming to rest. how far was the spring compressed before releasing the block?
