1. The problem statement, all variables and given/known data a horizontal spring-mass is composed of a spring with constant 10.0 N/m and an 80.0 gram mass on the end of the spring. the surface supporting the mass is friction less. when the system is first observed, the spring is extended 1.30 cm and the velocity of the mass is 54.1 cm/s in the negative x direction a. find angular frequency, linear frequency, and the period. b. apply the given info and your results from part a to find the values for Xsub m, and Φsub m. 2. Relevant equations w=sqrt(k/m), f= w/2pi, and t=1/f x=Acos(w+Φ) 3. The attempt at a solution i found w=11.2 f=1.78 and t=.56 for part b i seem to be totally stuck, i would really appreciate a push towards the right direction. i looking at conservation of energy to find the amplitude but i don't know what energy is so i get stuck with two unknowns.