If a base runner passes a forward runner who is not out, the passing runner is _________.
1 answer:
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<h2>Right answer: acceleration due to gravity is always the same </h2><h2 />
According to the experiments done and currently verified, in vacuum (this means there is not air or any fluid), all objects in free fall experience the same acceleration, which is <u>the acceleration of gravity</u>.
Now, in this case we are on Earth, so the gravity value is
Note the objects experience the acceleration of gravity regardless of their mass.
Nevertheless, on Earth we have air, hence <u>air resistance</u>, so the afirmation <em>"Free fall is a situation in which the only force acting upon an object is gravity" </em>is not completely true on Earth, unless the following condition is fulfiled:
If the air resistance is <u>too small</u> that we can approximate it to <u>zero</u> in the calculations, then in free fall the objects will accelerate downwards at and hit the ground at approximately the same time.
Answer:
- Yes.
Explanation:
A particular solution for the 1D wave equation has the form
where A its the amplitude, k the wavenumber, ω the angular frequency and φ the phase angle.
Now, for any given position , we can use:
so, the equation its:
.
This is the equation for a simple harmonic oscillation!
So, for any given point, we can use a simple harmonic oscillation as visual model. Now, when we move a distance from the original position, we got:
and
now, this its
So, there its a phase angle difference of . We can model this simply by starting the simple harmonic oscillation with a different phase angle.