How Do You Calculate Amplitude and Period in Simple Harmonic Motion?

[superaznnerd]

hard physics question! help please

Homework Statement

How do I solve the 2 questions below?:

Questions 23 24
A 0.l kilogram block is attached to an initially unstretched spring of force constant k = 40 Newtons per meter as shown above. The block is released from rest at time t = 0. (the image is attached below).

23. What is the amplitude of the resulting simple harmonic motion of the block?
(A) m (B) (C) (D) (E) 1m

24. At what time after release will the block first return to its initial position?
(A) (B) (C) (D) (E)

Homework Equations

w^2= k/m
x = Asin(wt)
F=kx
dunno wat else??

The Attempt at a Solution

I tried plugging in those 3 equations together and manipulating equations. couldn't get anything though. Someone please help. I think I'm missing an important equation.

 

[superaznnerd]

bumped

 

[superaznnerd]

can someone help pl0x

 

[SammyS]

How far does the spring stretch when the net force on the block is zero? i.e. when k·|x-x₀|=mg .

Describe the motion of the block (in words) over one complete period.