A 30cm long spring is attached to the ceiling and hangs vertically. You attach a 600g mass to the end and give it an ini

[answerhappygod]

A 30cm long spring is attached to the ceiling and hangs
vertically. You attach a 600g mass to the end and give it an
initial displacement, causing it to undergo simple harmonic motion.
The period of oscillations is 0.5 seconds.
(a) What is the angular frequency and the spring constant k?
(b) How far would the spring stretch at equilibrium?
(c) The escape velocity of the planet is 15 m/s. Upon reaching
the surface, you observe the spring now stretched 8.3 cm. Calculate
the radius and mass of the planet