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 k = 4400 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 75.0 kg are pushed against the other end, compressing the spring 0.355 m. The sled is then released with zero initial velocity.
What is the sled's speed when the spring returns to its uncompressed length?
and i got 2.72 m/s which is correct
and i still need to solve: What is the sled's speed when the spring is still compressed 0.215 m?
2006-10-21 11:15:16 · 1 answers · asked by Theresa C 2 in Science & Mathematics ➔ Physics
so i have KE and to get KE you need to (.5)kx^2
and to get v= sqrt(2KE/m)
2006-10-21 18:33:01 · update #1
calculate the difference in potential energy for the two positions, which is the difference in kinetic erergy
2006-10-21 11:25:32 · answer #1 · answered by arbiter007 6 · 1⤊ 0⤋