Friday

April 18, 2014

April 18, 2014

Number of results: 160,423

**Precalc**

A line in space has the vector equation shown here. Fill in the blanks to find the position vector to the fixed point on the line that appears in the equation: vector r=(5+(6/11)d)vector i + (3+(9/11)d)vector j + (7+(2/11)d)vector k vector v= _____ vector i + _____ vector j + ...
*Wednesday, January 18, 2012 at 7:07pm by Grace*

**Physics**

Let vector A = 4i^ + 4j^, vector B = -2i^ - 5j^, and vector F = vector A - 5(vector B). a) Write vector F in component form. vector F = ? b) What is the magnitude of vector F? F = ? c) What is the direction of vector F? theta = ? Thank you!
*Saturday, October 8, 2011 at 11:24pm by Sara*

**Physics**

Let vector A = 4i^ + 4j^, vector B = -2i^ - 5j^, and vector F = vector A - 5(vector B). a) Write vector F in component form. vector F = ? b) What is the magnitude of vector F? F = ? c) What is the direction of vector F? theta = ? Thank you!
*Monday, October 10, 2011 at 6:49pm by Sara*

**physics grade 11 (vector)**

break the NE into N, and E components. Then add to the W (W=-E) Recombined into one vector.
*Sunday, October 17, 2010 at 2:17pm by bobpursley*

**cartesian vectors 2**

let vector U = (vector u1, vector u2) vector V = (vector v1, vector v2) and vector W = (vector w1, vector w2) Prove each property using Cartesian vectors: a) (vector U+V)+W = vector U+(v+W) b) k(vector U+V) = k vector U + k vector V c) (k+m)vector U = k vector U + m vector U
*Saturday, July 31, 2010 at 1:18pm by Shaila*

**College Physics**

Vector Algebra let A vector=6ihat+3jhat, B vector= -3ihat-6jhat D vector=A vector-B vector what is D vector? Thank You!
*Tuesday, September 13, 2011 at 8:37pm by Sher*

**science(physics)**

vector a+ vector b= 2i Vector a+ vector b=4j Then the angle between vector a and vector b is ? Plz.solve
*Friday, June 10, 2011 at 1:34am by marley*

**Precalc**

I have: A. vector n= 3*vector i + 2*vector j + 5* vector k B. vector v= 7*vector i + 10*vector j + vector k C. 52.46 degrees And I'm not quite sure for D...
*Wednesday, January 18, 2012 at 8:02pm by Grace*

**College Physics**

Take the vector from O to B and subtract the vector from O to A (which is the same as adding the vector from A to O). The result will be the displacement vector from A to B. The vector components of the vector from A to b will tell you the direction. Divide the displacement ...
*Saturday, September 20, 2008 at 11:56pm by drwls*

**Math - vectors**

In the product F(vector)=q(V(vector)xB(vector), take q = 4, V(vector)= 2.0i + 4.0j + 6.0k and F(vector)= 136i -176j + 72k. What then is B(vector) in unit-vector notation if Bx = By?
*Wednesday, March 28, 2007 at 6:46pm by sam*

**physics**

Vector vector A has a magnitude of 27 units and points in the positive y-direction. When vector vector B is added to vector A , the resultant vector vector A + vector B points in the negative y-direction with a magnitude of 18 units. Find the magnitude of vector B ?
*Thursday, February 10, 2011 at 5:42pm by jj*

**University Physics**

If vector B is added to vector C = 6.7 + 6.9, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of vector C. What is the magnitude of vector B?
*Tuesday, September 6, 2011 at 3:43pm by Phil*

**physics**

Vector vector A has a magnitude of 6.90 units and makes an angle of 46.5° with the positive x-axis. Vector vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods find the following. (a) The vector sum vector A + vector B...
*Wednesday, September 29, 2010 at 11:22am by Bill Muary*

**Physics**

When two vectors vector A and vector B are drawn from a common point, the angle between them is phi. If vector A and vector B have the same magnitude, for which value of phi will their vector sum have the same magnitude as vector A or vector B?
*Thursday, August 26, 2010 at 10:46pm by Ami*

**jane**

1. a centripetal-acceleration addict rides in uniform circular motion with period T=2s and radius r=3m. at t1 his acceleration vector= 6(m/s^2)i + -4(m/s^2)j. At that instant, what are the values of vector b (dot) vector a and vector r (dot) vector a All I could figure out was...
*Tuesday, June 2, 2009 at 10:08pm by physics*

**Physics**

If the expression for a given vector is Vector A-Vector B=(4-5)i^+(3+2)j^ and the magnitude of the difference of the vector is equal to 5.1. What is the direction of the difference Vector A - Vector B. (in the counterclockwise and +x direction)
*Thursday, April 7, 2011 at 12:04pm by Allison*

**Physics**

The three vectors have magnitude a =3m, b= 4m and c=10m . On the x axis is vector a at 0 degrees then 30 degrees is vector b then 120 degrees is vector c. If vector c =p*vector a + q*vector b .What are the values of p? and q? I am expose to get -6.67 for p and then 4.33 for q...
*Friday, October 6, 2006 at 7:06pm by Jenny*

**Calc: PLEASE HELP!**

There is something wrong with what you are trying to prove. "Vector a" is a vector, but (Vector b • Vector c) is a scalar (just a number). I am assuming you really meant to write a dot product when you wrote Vector b • Vector c. You cannot add a scalar to a vector.
*Tuesday, July 1, 2008 at 2:51pm by drwls*

**Physics**

For (a), draw and solve a vector diagram. Air velocity + Airspeed vector = Ground speed vector For (b) Multiply the Ground speed vector by 2 hours, and the answer will be the displacement vector. I will be glad to critique your work.
*Sunday, October 28, 2007 at 3:29pm by drwls*

**physics**

Vector has a magnitude of 122 units and points 37.0 ° north of west. Vector points 64.0 ° east of north. Vector points 17.0 ° west of south. These three vectors add to give a resultant vector that is zero. Using components, find the magnitudes of (a) vector and (b) vector .
*Monday, January 27, 2014 at 8:57pm by lawrenvce*

**physics**

The drawing shows a force vector vector F that has a magnitude of 600 newtons. It lies at alpha = 67° from the positive z axis, and beta = 31° from the positive x axis. (that's the diagram given) webassign. (delete this space) net/CJ/p1-39alt.gif (a) Find the x component of ...
*Thursday, September 10, 2009 at 9:53pm by RE*

**Physics**

You are given vectors A = 5.0i - 6.5j & B = -3.5i + 7.0j. A third vector C lies on the xy-plane. Vector C is perpendicular to vector A, & the scalar product of C with B is 15.0. From this information, find the components of vector C.
*Sunday, June 23, 2013 at 6:19am by Cathy*

**Physics**

The acceleration of a particle moving only on a horizontal xy plane is given by a=5ti+6tj, where a is in meters per second-squared and t is in seconds. At t=0, the position vector r=(19.0m)i+(39.0m)j locates the particle, which then has the velocity vector v=(5.70m/s)i+(3.40m/...
*Saturday, March 15, 2014 at 11:16pm by Stacey*

**physics**

Suppose vector A=3i-2j, B= -i-4j and vector C are three vectors in xy plane with the property that vectors A+B-C. What is the unit vector along vector C?
*Saturday, January 28, 2012 at 7:25am by Abdela said yimer*

**physics (vector)**

the resultant of two vector A and B pependicular to vector A and its magnitude is equalto half the magnitude of vector b what is the angle between them . How?
*Monday, June 6, 2011 at 11:34pm by shwet*

**Physics **

For the three vectors A+B+C= -1.4i. Vector A is 4i and vector C is -2j. Write vector B as components separated by a comma. What is the magnitude of vector B? How many degrees above the negative x-axis does vector B point? Measure the angle clockwise from the negative x-axis.
*Tuesday, September 11, 2012 at 1:06am by bobby*

**physics**

i dont see this in my book in a coordinate system, a vector is oriented at angle theta with respect to the x-axis. The y component of the vector equals the vector equals the vector's magnitude multiplied by which trigonometric function?
*Wednesday, February 18, 2009 at 10:17am by y912f*

**Physics**

The displacement vector required to reach the station is the original vector to the station, minus the vector of their actual initial travel. This is a vector subtraction ptoblem. You will have to do the steps yourself. We are not here to do your homework for you.
*Wednesday, August 18, 2010 at 10:36pm by drwls*

**physics- TEST TMRW PLS HELP!**

In general The moment vector about any point O of force vector F is M = R x F where R is the vector from point O to a (any) point on vector F and F is the force vector
*Sunday, December 9, 2012 at 7:11pm by Damon*

**physics- TEST TMRW PLS HELP!**

In general The moment vector about any point O of force vector F is M = R x F where R is the vector from point O to a (any) point on vector F and F is the force vector
*Sunday, December 9, 2012 at 7:11pm by Damon*

**physics**

The components of vector A are Ax and Ay (both positive), and the angle that it makes with respect to the positive x axis is θ. Find the angle θ if the components of the displacement vector A are (a) Ax = 11 m and Ay = 11 m, (b) Ax = 19 m and Ay = 11 m, and (c) Ax = ...
*Sunday, January 30, 2011 at 8:04pm by thaokieu*

**physics [vectors]**

The concept i get, but somehow i just can't execute this problem, please help me! You are given vectors A = 5.5 6.2 and B = - 3.7 7.4 . A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 19.0. I need x and y ...
*Sunday, August 30, 2009 at 10:45pm by lina*

**maths vector**

if a vector+ b vector+ c vector =0, & a vector=3, b=5, c=9, find angle between a & b vector
*Saturday, March 16, 2013 at 11:25am by Anonymous*

**physics grade 11 (vector)**

An airplane is flying 400 km/h west. There is a wind blowing 100 km/h NE. What is the airplane's actual speed and heading?
*Sunday, October 17, 2010 at 2:17pm by lawrence*

**physics**

Draw the vector diagram. Draw the N vector. THen, from the top of the N vector, sketch the flow of water vector. Now, the resultant is from the bottom of the N vector to the tip of the water vector. Using the law of cosines: R^2=B^2 + W^2 -2BWcos60 and the direction, from the ...
*Sunday, September 4, 2011 at 9:51am by bobpursley*

**Physics**

A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
*Tuesday, July 6, 2010 at 8:44am by Anonymous*

**Physics**

A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
*Tuesday, July 6, 2010 at 8:44am by Anonymous*

**Physics**

A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
*Tuesday, July 6, 2010 at 8:44am by Anonymous*

**Physics**

Break the second force into a S and a W vector. The S subtracts from the original N vector. With that resultant, add to the W vector.
*Wednesday, October 7, 2009 at 8:48pm by bobpursley*

**physics**

The x-component of vector A is -25.0 m and the y-component is +40.0 m. a) what is the magnitude of vector A? b) What is the angle between the direction of vector A and the positive direction of vector x? can you please help me with the steps to accomplishing these?
*Sunday, September 13, 2009 at 12:47pm by Mallory*

**physics**

Data: theta_1 = 44.9 theta_2 = 146.1 A = 4.8 cm B = 8.7 cm A)What is the x component of vector A? B)What is the y component of vector A? C)What is the x component of vector B? D)What is the y component of vector B? E)What is the magnitude of vector (A + B)?
*Saturday, January 25, 2014 at 10:46am by Sam*

**physics**

if vector a is fixed but vector b can be rotated in any direction. what should be the angle of vector b to give teh maximum resultant sum
*Monday, December 10, 2012 at 6:53pm by Anonymous*

**Calculus**

We need the direction of their line of intersection.... double the 2nd plane equation, then add that to the 1st x+2y-3z = -6 6x - 2y + 4z = 8 7x + z = 2 z = 2-7x let x=1 then z = -5 back in the 1st 1 + 2y + 15 = -6 y = -11 -----------> point (1,-11,-5) let x = 0 then z = 2 ...
*Monday, May 7, 2012 at 8:28pm by Reiny*

**physics**

A vector has components Ax = 44 m and Ay = 30 m. Find the length of the vector vector A and the angle it makes with the x axis. in meters and in degrees
*Wednesday, January 28, 2009 at 2:46am by kj*

**Calc: PLEASE HELP!**

How can this be proven! I have tried so many ways! PLEASE help! Verify using an example that Vector a + (Vector b • Vector c) = (Vector a • Vector b) + Vector c? Explain your reasoning.
*Tuesday, July 1, 2008 at 2:51pm by Sick Sick*

**Calculus**

1.Find vectors v*w if vector v = 5 vector i – 4 vector j + 4 vector k and vector w = –6 vector i + 3 vector j – 2 vector k. 2.Find vectors v*w if vector v = -3 vector i – 4 vector j - 8 vector k and vector w = 2 vector i + 6 vector j + 4 vector k.
*Thursday, August 30, 2012 at 4:20pm by batmo*

**Physics**

Not the average of the two - you need to find the vector which, when added to the windspeed vector, will give the vector to the desired destination. So you are really subtracting vectors. Try that....
*Monday, September 6, 2010 at 11:15pm by kristen*

**math**

4. When writing a vector as the sum of two vector components, the first vector to calculate is just the projection of a vector onto another vector. True 5. Work represents a scalar value. True
*Monday, June 17, 2013 at 4:53pm by mysterychicken*

**Calculus - Dot Product**

consider a rhombus ABCD a) find the resultant of vector AB + vector AD and vector AB - vector AD? (cosine rule) b) What will be the value of the dot product of vector AB + vector AD and vector AB - vector AD always be? (always zero) c) Is this value of the dot product of ...
*Monday, August 9, 2010 at 9:06am by Shaila*

**Physics**

In a coordinate system, a vector is oriented at angle theta with respect to the x-axis. They y component of the vector equals the vector's magnitude multiplied by which trig function? ... please explain
*Wednesday, February 4, 2009 at 9:27pm by y912f*

**Physics**

In a coordinate system, a vector is oriented at angle theta with respect to the x-axis. They y component of the vector equals the vector's magnitude multiplied by which trig function? ... please explain
*Wednesday, February 4, 2009 at 9:28pm by y912f*

**PHYSICS-HELP!!**

I will be glad to critique your work. We are getting more physics questions than we can handle in a timely manner, and have to be selective about who receives help. . Your information on the first cyclist establishes the vector distance of campground from the starting point. ...
*Thursday, September 16, 2010 at 10:55pm by drwls*

**physics**

Which of the following statements is a true statement? A. A vector can have positive or negative magnitudes. B. A vector's magnitude cannot be more than the magnitude of one of its components. C. If the x-component of a vector is smaller than its y-component then that vector ...
*Friday, December 6, 2013 at 11:45am by laura*

**Physics**

A diagram has vector A at 30 degrees above the positive x axis. length = 3 m Vector B is ON the negative x-axis. length = 1 m Vector C is ON the negative y-axis. Length is 2 m What is the direction in degrees of vector a + vector B + vector C?
*Sunday, January 29, 2012 at 3:39pm by Sushmitha*

**AP physics**

Vector vector A has a magnitude of 7.60 units and makes an angle of 48.5° counter-clockwise from the positive x-axis. Vector vector B has a magnitude of 8.00 units and is directed along the negative x-axis.
*Sunday, August 23, 2009 at 12:51am by emeka*

**Dot Product**

Verify using an example that Vector a • (Vector b • Vector c) = (Vector a • Vector b) • Vector c is not true. Explain your reasoning both numerically and by using the definition of the dot product. I am very confused as to what this means?! Thanks for the assistance.
*Tuesday, July 1, 2008 at 2:20pm by Putnam*

**Vactors 12**

Let A and B be any two points on the plane and O be the origin. Prove that vector AB = vector OB - vector OA. Let x be any other point on the plane prove that vector AB = vector xB - vector xA.
*Tuesday, July 20, 2010 at 2:36am by Shaila*

**Physics**

partscoretotalsubmissions1--10/12--10/13--10/14--10/1----4--The tail of a vector is fixed to the origin of an x, y axis system. Originally the vector points along the +x axis. As time passes, the vector rotates counterclockwise. Describe how the sizes of the x and y components...
*Monday, May 7, 2007 at 10:23am by Panda*

**Physics**

A vector of magnitude 10 unit combine in the nurth direction combine with another vector to give a zero resultant what is the other vector?
*Wednesday, May 11, 2011 at 6:04am by Mashkur*

**Physics**

The acceleration of a particle moving only on a horizontal xy plane is given by , where is in meters per second-squared and t is in seconds. At t = 0, the position vector locates the paticle, which then has the velocity vector . At t = 3.60 s, what are (a) its position vector ...
*Monday, February 3, 2014 at 12:10pm by Catherine*

**Mathematics - Dot Product**

Consider rhombus ABCD a) Find the resultants of vector AB + vector AD and vector AB - vector AD b) What will the value of (vector AB + vector AD) dot product (vector AB - vector AD) always be? Explain. c) Is the value of (vector AB + vector AD) dot product (vector AB - vector ...
*Friday, August 20, 2010 at 12:50am by Suhani*

**Mamthematics - Vectors**

a) If vector u and vector v are non-collinear vectors show that vector u, vector u cross product vector v and (vector u cross product vector v) cross product vector u are mutually othogonal. b) Verify this property using vectors collinear with the unit vector, i, j and k c) ...
*Friday, August 20, 2010 at 12:38am by Suhani*

**Calculus**

What does this mean? For any vector Vector a find Vector a × Vector a. Explain why (this is cross product stuff). Thanks
*Tuesday, July 1, 2008 at 12:44pm by Derek*

**Calculus and vectors**

Vector AB is a vector whose tail is at (-4,2) and whose head is at (-1,3). Calculate the magnitude of vector AB Determine the coordinates of point D on vector CD, if C (-6,0) and vector CD= vector AB. Please I need some help. Is there a formula to solve this? Pls help
*Tuesday, February 5, 2013 at 4:11pm by Ted*

**Calculus and vectors**

Vector AB is a vector whose tail is at (-4,2) and whose head is at (-1,3). Calculate the magnitude of vector AB Determine the coordinates of point D on vector CD, if C (-6,0) and vector CD= vector AB. Please I need some help. Is there a formula to solve this? Pls help
*Tuesday, February 5, 2013 at 4:11pm by Ted*

**PHYSICS VECTORS**

1. The problem statement, all variables and given/known data Find the vector product of Vector A cross Vector B(expressed in unit vectors) of the two vectors. What is the magnitude of the vector product? 2. Relevant equations Vector A= 5.00i + 2.00j Vector B= 3.00i - 1.00j 3...
*Thursday, September 17, 2009 at 10:18pm by RAYMOND*

**Physics**

Compute the velocity change vector during the 30 seconds and divide it by 30 for the average acceleration vector. Multiply that by the mass for the net force vector, Fnet. You know two of the three vectors that make up Fnet. Use that to determine the third (Wind) force vector
*Sunday, February 12, 2012 at 12:43am by drwls*

**Vectors**

make a sketch by completing the usual parallelogram , if U+V = R R^2 = 11^2 + 9^2 - 2(9)(11)cos 137° = 346.808 R = 18.62 now use the Sine Law to findØ, the angle between V and R. sinØ/9 = sin137°/18.62 sinØ = .329595 Ø = 19.24° with vector V, then 23.76° with vector U
*Sunday, July 24, 2011 at 7:45pm by Reiny*

**Physics**

24. In a 2-dimensional Cartesian system, the y-component of a vector is known, and the angle between vector and x-axis is known. Which operation is used to calculate the magnitude of the vector? (taken with respect to the y-component)
*Friday, June 11, 2010 at 9:52pm by anonymous*

**Physics**

The vector A -5.2 has a magnitude of 38m and points in the positive x direction. What is the x component of vector A? What is the magnitude of vector A?
*Friday, September 3, 2010 at 4:40pm by Jayson*

**Phyics**

Displacement = (final vector location) - (initial vector location) = (-16 sin45 j + 16 cos45 i) - 13 i = -24.3i + 11.3 j Which means it moved 24.3 km west and 11.3 km north. "i" and "j" are unit vectors east and north. The magnitude of the displacement is sqrt[(24.3)^2 + (11.3...
*Thursday, September 9, 2010 at 3:43pm by drwls*

**Physics**

Which of the following is an accurate statement? a) a vector cannot have zero magnitude if one of its components is not zero b) the magnitude of a vector can be less than the magnitude of one of its componenets c) if the magnitude of vector A is less than the magnitude of ...
*Wednesday, September 19, 2007 at 2:42pm by Tammy*

**PHysics**

Vector a has a magnitude of 5 m and is directed east. vector b has magnitude of 4m and is directed 35 degrees west of north. A)What is the magnitude and direction of vector a + vector b b)What is the magnitude and direction of vector b- vector a? I should have gotten a)4.2m at...
*Monday, October 2, 2006 at 3:31pm by Jesse*

**Physics**

Vector A has a magnitude 12m and is angled at 60 degrees counterclockwise from the positive direction of the x axis of an xy coord. system. Also. Vector B = (12m)i + (8m)j on that same coord system. Rotate the system counterclockwise about the origin by 20 degrees to form an x...
*Sunday, June 27, 2010 at 4:27pm by Rick*

**Physics**

vector m•a=vector m•g +vector F(spring) a=0 => 0=vector m•g +vector F(spring) x: 0 = m•g•sinα –k•x, x=m•g•sinα/k=6.1•9.8•sin 39°/126 =0.3 m
*Monday, November 5, 2012 at 5:00pm by Elena*

**Physics**

The vector sum of the velocity with respect to air (speed and heading) and the wind velocity vector must be 150 km/s in a south direction. Write that as a vector equation and solve for the unknown components.
*Tuesday, November 23, 2010 at 3:48pm by drwls*

**AP physics**

Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A + B and (b) the vector difference A – B. Could...
*Sunday, August 23, 2009 at 12:51am by jackie*

**Precalc**

Given the plane 3x+2y+5z=54 and the points P0(6, 8, 4)[on plane] and P1(13, 18, 5) [not on plane] A. Find vector n, a vector normal to the plane B. Find vector v from P0 to P1 C. Find the angle between vector n and vector v D. Find p, the scalar projection of vector v on ...
*Wednesday, January 18, 2012 at 8:02pm by Grace*

**Math - Algebraic Vectors**

Do not confuse the problem of finding the length of a line segment if you know the two end points with finding the length of a vector. Suppose we have 2 points A(8,3) and B(11,7) then vector AB = [3,4] and │AB│ = √(3^2+4^2) = 5 line segment AB = √((11-8...
*Tuesday, February 12, 2008 at 7:27am by Reiny*

**chemistry**

The tail of A vector is fixed to the origen of an X, Y axis system.Originally the vector points along the X axis. As time passes, the vector rotates counterclockwise. Describe how the sizes of the X and Y components of the vector compare to the size of the original vector for ...
*Tuesday, February 6, 2007 at 6:52pm by anonymous*

**Physics**

Given VectorA=12i+7j-5k and Vector B= 2i-4j+3k 1)Find angle theta between vector A and vector B? 2)Fine VectorB x VectorA How would I go about doing these problems ?
*Tuesday, September 14, 2010 at 11:50pm by Rima*

**physics**

The acceleration of a particle moving only on a horizontal plane is given by a= 3ti +4tj, where a is in meters per second-squared and t is in seconds. At t = 0s, the position vector r= (20.0 m)i + (40.0 m)j locates the particle, which then has the velocity vector v= (5.000 m/s...
*Friday, February 24, 2012 at 3:06am by amy*

**physics**

The acceleration of a particle moving only on a horizontal plane is given by a= 3ti +4tj, where a is in meters per second-squared and t is in seconds. At t = 0s, the position vector r= (20.0 m)i + (40.0 m)j locates the particle, which then has the velocity vector v= (5.000 m/s...
*Friday, February 24, 2012 at 3:14am by amy*

**physics**

B = C - A in vector notation. Subtracting a vector is the same as adding its negative. Do the vector subtraction for the answer. Using the components method will get you the x and y components of B. From those two components, get the magnitude and direction
*Sunday, September 13, 2009 at 11:54pm by drwls*

**calculus**

Let's pick an arbitrary value for the first component, say 1. then let the vector be (1,b) (1,b)∙(3,4) = |(1,b)||(3,4)cos60° 3 + 4b = √(1+b^2)(5)(1/2) 6 + 8b = 5√(1+b^2) 36 + 96b + 64b^2 = 25(1+b^2) after squaring both sides 39b^2 + 96b + 11 = 0 Using the ...
*Wednesday, August 31, 2011 at 12:46pm by Reiny*

**physics**

Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A + B and (b) the vector difference A – B. Could...
*Friday, August 28, 2009 at 3:14pm by benjamin*

**Physics**

Use the definition of scalar product( vector A* vector B = abcos theda and the fact that vector A * vector B = axbx+ ayby+azbz to calculate the angle between the two vectorgiven by vector A= 3i + 3j + 3k and vector B= 2i + 1j + 3k. The book said the answer is 22 degreess but I...
*Friday, October 6, 2006 at 5:02pm by Jamie*

**physics**

Position vector r has magnitude of 14.8m and direction angle 240 degrees. 1. Find it's components, enter x and y components of the vector 2. Find the components of the vector -2r, enter x and y components of the vector 3. Find the magnitude of the vector -2r.
*Thursday, September 20, 2012 at 10:14pm by Jessica*

**Physics**

Your question does not make sense, especially "I think it is true..". Torque is specific to axis of rotation, and perpendicular distance to the axis of rotation. if axis of rotation is a vector, then distance is a vector perpendicular to that axis vector. Torque= force (a ...
*Friday, December 16, 2011 at 11:42am by bobpursley*

**Physics**

Take the "dot product" of the force vector and the displacement vector. If i is the x unit vector and j is the y unit vector, the force vector is F = 2.4 sin 100 i + 2.4 cos 100 j The displacement vector is deltaR = 3.0 i + 4.1 j W = F . (deltaR) = 7.2 sin 100 + 9.84 cos 100
*Friday, October 30, 2009 at 12:50pm by drwls*

**calculus**

Triangle ABC is an equalateral triangle, with O it's centroid. a) Show that vector OA + vector OB + vector OC = vector 0
*Saturday, April 24, 2010 at 4:31pm by Anonymous*

**physics**

The equation of motion is (in vector form) vector( ma) = vector (m•g) + vector F(fr)+ vector N Projections on the axes x: m•a = m•g•sinα - F(fr) y: 0 = N - m•g•cosα F(fr) =k•N = k• m•g•cosα a = g•( sinα - k•cosα) s =Vo•t +at^2/2.
*Friday, April 6, 2012 at 1:11pm by Elena*

**math-complex numbers**

If z = -3+4i, determine the following related complex numbers. a)vector z b)3(vector z) c) 1/(vector z) d) |z| e) |vector z| f) (vector z)/(|z|^2)
*Friday, October 11, 2013 at 10:45am by Rinchan*

**maths**

Given that vector c and vector d are non zero vectors such that vector c =x1i + y1j + z1k and vector d =(y1z2-y2z1)+(x1y2 -x2y1)show that the two vectors are perpendicular.
*Saturday, February 18, 2012 at 8:25am by victor m*

**Calculus**

a square is defined by the unit vectors i(vector) and j(vector). FInd the projections of i(vector) and j(vector) on each of the diagonals of the square.
*Monday, October 15, 2012 at 6:03pm by Jennifer*

**physics (vector)**

Let the direction of the 1 n vector be up (+y direction). The components of the resultant are: 1 n: 1 j (j is a unit vector in +y direction) 2 n: -1 j + sqrt3 i (i is a unit vectyor in +x direction) 3 n: -1.5 j -(3/2)sqrt3 i vector sum: -1.5 j + -(1/2)sqrt3 i magnitude = sqrt[...
*Monday, June 6, 2011 at 11:46pm by drwls*

**ap calculus.linear**

earnings = 0.05 A•f A+f is meaningless, since you can't add ft^2 and n. A•f computes the total ft^2 mowed. For various earnings, you'd also need a vector of rates. Not sure how to do that with just vector operations. Say the rates were 0.05, 0.10, 0.07, 0.12, 0.05, 0.08, 0.13...
*Wednesday, February 26, 2014 at 3:11am by Steve*

**physics**

It will take the particle t = 18.4/9.4 = 1.957 s to go from wall to wall. In doing so, it will acquire a velocity component parallel to the wall equal to Vy = 5.8*t = 11.35 m/s Compute the vector sum of 11.35 m/s and 9.4 m/s at right angles
*Sunday, December 16, 2012 at 9:35pm by drwls*

**Physics**

The velocity vefot of a ball is v(t)=-3x+4y at any time. Its initial position is r=12x-4y. The components of the velocity vector are in m/s and the components of the position vector are in meters. The symbols x and y are the unit vetors in x and y directions respectively. Find...
*Sunday, September 26, 2010 at 6:14pm by Sarah*

**Math**

Express the vector as a combination of the standard unit vectors i and j. v = AB where A = (10,-11) and B = (-11,8) I want to make sure I did this right: <-11-10, 8--11> = <-21, 19> So it's -21i + 19j? Thank you!
*Saturday, April 25, 2009 at 1:56pm by Momo*

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