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# Problem: At a waterpark, sleds with riders are sent along a slippery, horizontal surface by the release of a large, compressed spring. The spring with a force constant exttip{k}{k} = 4100 N/m and negligible mass rests on the frictionless horizontal surface. One end is in contact with a stationary wall. A sled and rider with total mass 71.0 kg are pushed against the other end, compressing the spring 0.380 m . The sled is then released with zero initial velocity.You may want to review (Pages 183 - 189). For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Motion with a varying force.What is the sleds speed when the spring returns to its uncompressed length?What is the sleds speed when the spring is still compressed 0.205 m ?

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###### Problem Details
At a waterpark, sleds with riders are sent along a slippery, horizontal surface by the release of a large, compressed spring. The spring with a force constant = 4100 N/m and negligible mass rests on the frictionless horizontal surface. One end is in contact with a stationary wall. A sled and rider with total mass 71.0 kg are pushed against the other end, compressing the spring 0.380 m . The sled is then released with zero initial velocity.

You may want to review (Pages 183 - 189).

For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Motion with a varying force.

What is the sleds speed when the spring returns to its uncompressed length?

What is the sleds speed when the spring is still compressed 0.205 m ?