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).
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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 ?