Two springs look alike but have different spring constants. how could you determine which one has the greater spring constant?
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Ответ:
As we know that spring force on a system of spring is given as
here we know that
k = spring constant
x = deformation in the spring
F = spring force
So here we know that from above formula we have
so on applying same force if two springs have different deformations then the spring with small amount of deformation the value of spring constant will be more
so here in order to find the spring with greater spring constant we will suspend same mass in both springs so there will be equal force on both the springs.
Now the spring with lesser deformation will have more spring constant
Ответ:
Remember that the vertex form of a parabola is
where
is the vertex of the parabola.
Now, to find the vertex of the parabola, we are going to use the vertex formula:
For a quadratic of the form
, the vertex
is given by:
We know form our quadratic that
and
, so let's use our formula to find
:
Now we can evaluate our function at
to find
:
Now, we can rewrite our parabola in vertex form:
We can conclude that the correct answer is: y = 6(x + 1)2 – 16