Answer: I think the last one, I am not sure but from what I learned what it looks like.
Explanation:
Answer:
Explanation:
From the text of the complete problem found on internet, the expression of the force is:
The rate of change of F with respect to t can be find by calculating the derivative of F with respect to t.
First of all, let's recall the derivative of sine and cosine:
We have to calculate the derivative of a composite function, of the form
Its derivative is given by
By applying this formula to our expression, we find:
And by substituting the given data:
W = 45 lb
we find:
Answer/Explanation
A useful analogy for explaining the Earth's gravity force is that the Earth can pull on objects without touching them just like a magnet can affect other objects without touching them. The main notion to convey here is that forces can act at a distance with no perceivable substance in between.