256 Answered Questions for the topic Vectors

04/30/19

Determine the angle (in degrees) between the vectors ⟨ 4 , − 5 ⟩ and ⟨ − 3 , − 2 ⟩ .
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Vectors Calculus

04/27/19

Two canoeists are paddling a canoe. Vector analysis
Two canoeists are paddling on opposite sides of a canoe. One extends her arms out so that the force of 15lbs she exerts is directed backwards at an angle of 22 degrees with the canoe. The other... more
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04/02/19

Calculate ground speed of plane.

A plane is heading due west: its nose points towards the west direction, but its trajectory on the ground deviates from the west direction due to a sideways component of the wind. The plane is also... more
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03/22/19

What is vector division?
My question is: We have addition, subtraction and muliplication of vectors. Why cannot we define vector division? What is division of vectors?
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02/27/19

Vectors/Physics- Boat Crossing River
The current in a straight river is flowing so that if a motorboat travels upstream at an angle of 20 degrees with a velocity of 15km/hr, it will land at a spot on the opposite shore directly... more
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Vectors

01/02/19

Is possible to add two vectors of unequal magnitudes and get zero?
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09/30/18

A plane flies 1200 km in 2.5 hours. What is the average speed of the flight?
The answer choices are A) 480 km/hr B) 300 km/hrC) 1200 km/hrD) 200 km/hr
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09/04/18

C-(-4,2,4). Find the distance between the point (x,y,z) and C.
I had tried the points (0,0,0)-(-4,2,4) and then use the distance formula, but that has not worked. Then I tried (1,1,1), but that also did not work. I am lost. Any help is needed.
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Vectors Calculus 3

08/31/18

Find the length of ->OR.
(We are talking about vectors.   R = (4, 5, 5).   Then it has,   ||->OR|| = _____.   I'm not sure how you find OR if you do not have what O is. Thank you. (Arrows are supposed to be on... more
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Vectors Calculus 3

08/29/18

Find the equation of a sphere if one of it's diameters has endpoints (-10,0,-6) and (4, 14, 8).
I have written:   (x+3)2+(y-7)2+(z-1)2-sqrt(588)/2 = 0. But it is marked incorrect.    
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Vectors Calculus 3

08/29/18

Find an equation of the largest sphere with center (5, 3, 6) and is contained in the first octant. Be sure your formula is monic.
I had put the equation as:   (x-5)^2+(y-3)^2+(z+6)^2   However it was viewed as incorrect. Also they had that it equaled zero.   equation input = zero.
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Vectors

08/04/18

Simple(?) Vector Problem
A river flows northward with a velocity of 3 km/hr. A man rows a boat eastward with a velocity 4 km/hr relative to the water. The river is 1 km wide. a) find his speed and direction relative to... more
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07/01/18

Sum of direction angles of vector [0,1,0] is?
pi/2, 0, pi or 3pi/2? Also explain plz thank you. 
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06/19/18

Vector v has its initial point at (7, -9) and its terminal point at (-17, 4).
Vector v has its initial point at (7, -9) and its terminal point at (-17, 4). Which unit vector is in the same direction as v? 
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Vectors

05/26/18

Evaluate the expression: v ⋅ w Given the vectors: r = <5, -5, -2>; v = <2, -8, -8>; w = <-2, 6, -5>
Precalculus
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Vectors

05/26/18

Find the angle between the given vectors to the nearest tenth of a degree. u = <2, -4>, v = <3, -8>
Precalculus
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Vectors

05/11/18

Find the angle between the vectors A and vector B if |A+B|=|A-B|
School work
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Vectors Vector

04/30/18

Let v be the vector (3 over p), such that |v| = 17. Calculate all possible values of p.
Let v be the vector (3 over p), such that |v| = 17. Calculate all possible values of p.   * (3 over p) - I wrote it this way because the 3 is actually positioned above the p. I need to... more
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Vectors

04/27/18

Let u and v be vectors such that u = -3i + 2j and v = ai + 5j
Let u and v be vectors such that u = -3i + 2j and v = ai + 5j, where a ∈ R.  a. Find all values of a for which u and v are perpendicular. 
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Vectors

04/12/18

The vectors A=i+4j+3k and B=4i+2j-4k are
Inter 1st year basics learner Physics home work
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Vectors Physics

04/12/18

Angle between -4i+2j and 9k is
Inter 1st year basics learner This is homework
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04/10/18

If vector u is <3,4> and vector b is also <3,4>, then is vector a parallel to b or is it equal to it
I am honestly confused on if 2 vectors have the same change in x and y values then is it parallel or equal to it. And for example if 1 vector is double the other then how are they parallel, whywo... more
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Vectors

04/03/18

A boat heading across river at velocity of 25 mph perpendicular to the current. The river downstream at 10 mph. What is the actual velocity of the boat
What is the answer to the question and how do we do it  
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03/25/18

Differential Equation Question
How would I write this in matrix form (x' = AX)    x' = x y' = y   Note: Is it supposed to be like this: x' = (1 v 1)(x v y) or x' = (1 + 0 v 1 + 0)(x v y)? Note: the "v" means the value after... more
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03/24/18

Differential Equation Problem. No clue how to do this.
Find the derivatives of each of the following vectors.   x(t) = [ t3 - 2t2 +t                 etsin(t) ]
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