(a) find the projection of u onto v and (b) find the vector component of u ortho

Reeves

Reeves

Answered question

2021-09-23

(1) find the projection of u onto v and (2) find the vector component of u orthogonal to v. u = ⟨6, 7⟩, v = ⟨1,4⟩

Answer & Explanation

Adnaan Franks

Adnaan Franks

Skilled2021-09-24Added 92 answers

Step 1

Recall that the projection of u onto v is given by:
w1=projvu=(uv||v||2)v
Given that u=<6,7> and v=<1,4>, we can find the projection of u onto v as shown below:
w1=projvu=(uv||v||2v=(<6,7><1,4><1,4><1,) 
=(61+7411+44)<1,4>
=3417<1,4>
=<2,8>
Step 2
Remember that the following is the vector component of u that is orthogonal to v:
Using the given vectors and the projection found in part (1), The vector component of u that is orthogonal to v can be found as shown below:
w2=uprojvu
=<6,7<2,8>
=<(62),(78)>
=<4,1>
1) w1=<2,8>
2) w2=<4,1>

Nick Camelot

Nick Camelot

Skilled2023-06-19Added 164 answers

Step 1: Calculate the dot product of 𝐮 and 𝐯:
𝐮·𝐯=(6)(1)+(7)(4)=6+28=34
Step 2: Calculate the magnitude of 𝐯:
𝐯=(1)2+(4)2=1+16=17
Step 3: Substitute the values into the projection formula:
proj𝐯(𝐮)=(34172)1,4=(3417)1,4=2,8
Therefore, the projection of 𝐮 onto 𝐯 is 2,8.
To find the vector component of 𝐮 orthogonal to 𝐯, we can subtract the projection from 𝐮:
comp𝐯(𝐮)=𝐮proj𝐯(𝐮)
Substituting the given values:
comp𝐯(𝐮)=6,72,8=4,1
Hence, the vector component of 𝐮 orthogonal to 𝐯 is 4,1.
Mr Solver

Mr Solver

Skilled2023-06-19Added 147 answers

To find the projection of vector 𝐮 onto vector 𝐯 and the vector component of 𝐮 orthogonal to 𝐯, we can use the following formulas:
(1) The projection of 𝐮 onto 𝐯, denoted as proj𝐯(𝐮), is given by:
proj𝐯(𝐮)=𝐮·𝐯𝐯2·𝐯
(2) The vector component of 𝐮 orthogonal to 𝐯, denoted as comp𝐯(𝐮), can be calculated as:
comp𝐯(𝐮)=𝐮proj𝐯(𝐮)
Given 𝐮=6,7 and 𝐯=1,4, we can substitute these values into the formulas to find the solutions:
(1) Projection of 𝐮 onto 𝐯:
proj𝐯(𝐮)=6,7·1,41,42·1,4
(2) Vector component of 𝐮 orthogonal to 𝐯:
comp𝐯(𝐮)=6,7proj𝐯(𝐮)
Eliza Beth13

Eliza Beth13

Skilled2023-06-19Added 130 answers

Step 1:
1. The projection of 𝐮 onto 𝐯, denoted as proj𝐯𝐮, is given by:
proj𝐯𝐮=(𝐮·𝐯𝐯2)𝐯
2. The vector component of 𝐮 orthogonal to 𝐯, denoted as comp𝐯𝐮, can be obtained by subtracting the projection of 𝐮 onto 𝐯 from 𝐮:
comp𝐯𝐮=𝐮proj𝐯𝐮
Step 2:
Now let's calculate these values using the given vectors:
Given:
𝐮=6,7
𝐯=1,4
Step 3:
1. To find the projection of 𝐮 onto 𝐯, we first calculate the dot product of 𝐮 and 𝐯:
𝐮·𝐯=(6)(1)+(7)(4)=6+28=34
Next, we find the squared magnitude of 𝐯:
𝐯2=(1)2+(4)2=1+16=17
Using these values, we can calculate the projection:
proj𝐯𝐮=(3417)1,4
Simplifying further:
proj𝐯𝐮=(21)1,4=2,8
Hence, the projection of 𝐮 onto 𝐯 is 2,8.
Step 4:
2. To find the vector component of 𝐮 orthogonal to 𝐯, we subtract the projection from 𝐮:
comp𝐯𝐮=6,72,8
Performing the subtraction:
comp𝐯𝐮=62,78
Simplifying further:
comp𝐯𝐮=4,1
Therefore, the vector component of 𝐮 orthogonal to 𝐯 is 4,1.

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