Name: /20 marks Module 7: Proficient Level (2 marks) 2) A vertical spring is stretched 60.0 cm by a hanging 5.00 kg mass. a) What is the spring constant? b) What will be the frequency of vibration of this spring system? waves are 4:0 m/s and 6.0 ed decreases to Module 7: Exemplary Level (2 marks) 3) An astronaut on the surface of a 6.50 X 1029 kg planet determines that an 80 cm pendulum requires 162 s to swing 50 cycles. What is the radius of the planet