please answer all, not needed explanation

Date: Ontario Virtual Name: School SPH4U UNIT 2 TEST - ENERGY AND MOMENTUM KU A TI C 20 20 10 10 Part A - Knowledge and Understanding [20 marks] Multiple Choice - Use a CAPITAL letter that best completes the statement or answers the question [10 marks] For questions 1 to 5 use the graphs provided below. (a) ( b ) () (e) 1. The y-variable is the work done by a spring; x is the spring's stretch. 2. The y-variable is the kinetic energy of an object; x is the object's speed. 3. The y vaiable is the period of the vibration of an object undergoing SHM; x is the frequency of vibration 4. The y-variable is the frequency of an object undergoing SHM in a mass-spring system; x is the force constant of the spring. 5. The y-variable is the period squared of an object undergoing SHM in a mass-spring system; x is the reciprocal of the force constant of the spring. 6. The y-vairable is the period squared of an object undergoing SHM in a mass-spring system; x is the force constant of the spring. 7. A child pulls a sleigh up the incline as shown below. The work done by gravity on the sleigh during this motion is a) mgL cose c) -mgL cose b) mgL sine d) -mgl sine e) none of these