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Semmy [17]
3 years ago
6

If vx = 7.60 units and vy = -6.60 units, determine the magnitude of v⃗ .

Mathematics
2 answers:
mart [117]3 years ago
6 0

Answer:

|v| = 10.06 units

Step-by-step explanation:

It is given that,

The x component of the vector is, v_x=7.6\ units

The y component of the vector is, v_y=-6.6\ units

We need to find the magnitude of vector v. The magnitude of any vector is calculated as :

|v|=\sqrt{v_x^2+v_y^2}

|v|=\sqrt{(7.6)^2+(-6.6)^2}

|v| = 10.06 units

So, the magnitude of vector v is 10.06 units. Hence, this is the required solution.

Liula [17]3 years ago
4 0
To find the magnitude of a vector, take the components, square them, then add them, then take the square root. This is very similar to the Pythagorean Theorem.

For your particular problem, I’ve included a picture showing how that specific calculation is done. :)

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Usimov [2.4K]

Answer: approximately 5148 feet directly north of point A

This is equivalent to 0.975 miles

==============================================================

Explanation:

Check out figure 1 (attached image below) to see how the drawing is set up.

Points A and B are separated by 2 miles, or 10560 feet. Use the conversion factor 1 mile = 5280 feet.

Because sound travels at roughly 1100 feet per second (assuming all of the conditions are right), this means that after x seconds, the sound wave has traveled a total distance of 1100x feet. This is the distance from A to C. Point C is the firework location.

The distance from B to C is 1100(x+6) feet because it takes 6 more seconds for the soundwave to travel from C to B, compared from C to A.

Note that triangle ABC is a right triangle. The 90 degree angle is at point A.

We can use the pythagorean theorem to solve for x

See figure 2 in the attached images to see the steps on solving for x. The numbers get quite big, though in the end x is fairly small. We end up with x = 4.68, which is approximate due to the 1100 figure being approximate.

This means the sound wave takes about 4.68 seconds to go from point C to point A.

With this x value, we can compute the expression 1100x to get

1100*x = 1100*4.68 = 5,148 feet

To convert this to miles, divide by 5280

(5148)/(5280) = 0.975

Therefore,

5148 feet = 0.975 miles

6 0
3 years ago
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Hoi!

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