208 Answered Questions for the topic Vectors

06/02/19

#### Mechanics question (Vectors)

I'm really confused as to what I'm supposed to do here can someone please explain...The question is:The horizontal unit vectors i and j are in the directions east and north respectively.A model...
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Vectors Calculus

05/23/19

#### VECTOR PROBLEM WITH FORCE

A block slides 42 m down a ramp that makes an angle of 60 degrees with the ground. Determine the mass of the block if 10 400 J of work was done. (Assume 1 kg exerts a force of 9.8 N).

Vectors Physics

05/04/19

#### What are the components of the vector 73.8 W41 degrees north

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...
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#### 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...
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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?

#### 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...
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Vectors Calculus

02/24/19

#### When subtracting vectors in a problem, how do you know which one to subtract from the other?

So in problems where you have to find the equation of a plane based on a coordinate point in the plane (6, 0, -2) that contains the line x=4-2t y=3+5t z=7+4t, you have to turn the parametric...
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Vectors

01/02/19

#### Is possible to add two vectors of unequal magnitudes and get zero?

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

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.

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...
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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.

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.

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...
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#### Sum of direction angles of vector [0,1,0] is?

pi/2, 0, pi or 3pi/2? Also explain plz thank you.

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?

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

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

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...
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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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