The displacement is the distance from the beginning point to the ending point. The time was just to throw you off. If he walks 30m due west, and then 5m due east, his displacement would be 30-5=25m to the west.
Answer:
x = A cos wt
Explanation:
To determine the position we are going to solve Newton's second law
F = m a
Spring complies with Hooke's law
F = -k x
And the acceleration of defined by
a = d²x / dt²
We substitute
- k x = m d²x / dt²
dx² / dt² + k/m x = 0
Let's call
w² = k / m
The solution to this type of differential equation is
x = A cos (wt + Ф)
Where A is the initial block displacement and the phase angle fi is determined by or some other initial condition.
In this case the body is released so that at the initial speed it is zero
From which we derive this expression
v = dx / dt = a w sin ( wt + Ф)
As the System is released for t = 0 the speed is v = 0
v = sin Ф = 0
Therefore Ф = 0
And the equation of motion is
x = A cos wt
Answer:
sentences 2,3, and 5
Explanation:
You can run a test to see if it is true or not for the correct answers.. You cannot test a planets feelings. They do not have feelings. Also, prettiest planet is an opinion. There is no wrong or right with that. Hope this helps.
Sound or Soundwaves travel through mediums by vibrating molecules. Sound waves mediums can often travel through gas, liquid, and solid. Compared to liquids, solids seem to travel better because the molecules that make up the matter are packed tightly.
