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Hard physics question help

  • #1
hard physics question!! help plz

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.
 

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Answers and Replies

  • #2


bumped
 
  • #3


can someone help pl0x
 
  • #4
SammyS
Staff Emeritus
Science Advisor
Homework Helper
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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.
 

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