physics
posted by minha .
A mass of 2 kg is hung from the lower end of a vertical spring and extends it by 40 cm. The mass is now pulled down a further 20 cm and is then released from rest so that it oscillates about the equilibrium position. Determine :
a) the spring stiffness constant k for the spring. (2 marks)
b) the time period of the oscillations. (4 marks)
c) the speed and acceleration of the mass when it is 15 cm from the equilibrium position. (6 marks)
d ) the maximum speed and maximum kinetic energy of the mass.
(4 marks)
e) the maximum accelerating force on the mass. (4 marks)

These are all standard formulas. What is it you do not understand?