A light spring having a force constant of 130N/m is used to pull a 7.50kg sled on a horizontal frictionless ice rink. The sled has an acceleration of 2.50m/s^2?

Question

Part A: By how much does the spring stretch if it pulls on the sled horizontally?

X=0.144m

Part B: By how much does the spring stretch if it pulls on the sled at 27.0∘ above the horizontal?

I figured out part a, but how do I find part b? Any advice?

Please and thanks!

Answer 1

http://answers.yahoo.com/question/index?qid=20110214141546AAp0rSP