If the current in a wire is directed upward, what is the direction of the magnetic field produced by the current?
2 answers:
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Answer:
θ = cos^(-1) (-A/B)
Explanation:
The image of the reauktant forces A & B are missing, so i have attached it.
Now, from the attached image, we will see that;
Angle between A and B is θ
Also;
A = Bcos(180° − θ)
Now, in trigonometry, we know that;
cos(180° − θ) = -cosθ
Thus;
A = -Bcosθ
cosθ = -A/B
Thus;
θ = cos^(-1) (-A/B)
The work done by Nick as he raises the given mass over the given distance is approximately 2 Joules.
Given the data in the question:
- Mass raised;
- Distance covered;
Work done;
First we calculate the force used to raise the mass to the given distance.
Since the movement was vertical, the force must over come the mass and the pull of gravity ( ).
Using Newton's second law of Motion;
We substitute our values into the equation
Now, we determine the work done by Nick.
Work done is simply the energy transferred from one store to another.
It is expressed as;
So we substitute our values into the equation
Therefore, the work done by Nick as he raises the given mass over the given distance is approximately 2 Joules.
Learn more about Newton's law of motion: brainly.com/question/20066791