Hi i need help re-stating Newton's Second law. It needs to be at least two sentences.
2 answers:
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Answer:
The tension on the clotheslines is
Explanation:
The diagram illustrating this question is shown on the first uploaded image
From the question we are told that
The distance between the two poles is
The mass tie to the middle of the clotheslines
The length at which the clotheslines sags is
Generally the weight due to gravity at the middle of the clotheslines is mathematically represented as
let the angle which the tension on the clotheslines makes with the horizontal be which mathematically evaluated using the SOHCAHTOA as follows
=>
=>
So the vertical component of this tension is mathematically represented a
Now at equilibrium the net horizontal force is zero which implies that
=>
substituting values
substituting values
Answer:
35.7 mA
Explanation:
The magnetic field inside a solenoid is given by:
(1)
where
is the vacuum permeability
I is the current
n is the number of turns per unit length
Since we have
N = 870 turns
L = 0.390 (length of the solenoid)
we can calculate n
And now we can re-arrange eq.(1) to find the current, I: