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Byju's Answer
Standard XII
Physics
Unit Vectors
Find the unit...
Question
Find the unit vector along
→
a
−
→
b
, where
→
a
=
^
i
+
3
^
j
−
^
k
and
→
b
=
3
^
i
+
2
^
j
+
^
k
.
Open in App
Solution
→
a
=
^
i
+
3
^
j
−
^
k
,
→
b
=
3
^
i
+
2
^
j
+
^
k
→
a
−
→
b
=
−
2
^
i
+
^
j
−
2
^
k
Unit vector along
→
a
−
→
b
=
→
a
−
→
b
|
→
a
−
→
b
|
|
→
a
−
→
b
|
=
√
(
−
2
)
2
+
1
2
+
(
−
2
)
2
=
3
⟹
Unit vector along
→
a
−
→
b
is
−
2
^
i
+
^
j
−
2
^
k
3
=
−
2
3
^
i
+
1
3
^
j
+
−
2
3
^
k
Hence, the unit vector is
−
2
3
^
i
+
1
3
^
j
−
2
3
^
k
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0
Similar questions
Q.
If
→
A
=
3
^
i
+
2
^
j
and
→
B
=
2
^
i
+
3
^
j
−
^
k
, then find a unit vector along
(
→
A
−
→
B
)
Q.
If
→
a
=
3
^
i
+
2
^
j
+
2
^
k
,
→
b
=
−
^
i
+
3
^
j
−
^
k
,
→
c
=
^
i
+
^
j
+
^
k
, then find the value of
→
a
×
(
→
b
×
→
c
)
and
(
→
a
×
→
b
)
×
→
c
Q.
If
→
a
=
2
^
i
−
5
^
j
+
8
^
k
,
→
b
=
^
i
−
3
^
j
−
^
k
,
→
c
=
−
3
^
i
−
2
^
j
−
^
k
, then find
|
→
a
+
→
b
+
→
c
|
.
Q.
Find the projection of the vector
→
a
and
→
b
, where
→
a
=
3
^
i
−
2
^
j
+
^
k
and
→
b
=
^
i
−
2
^
j
−
3
^
k
.
Q.
If
→
a
=
^
i
+
^
j
−
^
k
,
→
b
=
−
^
i
+
2
^
j
+
2
^
k
&
→
c
=
−
^
i
+
2
^
j
−
^
k
, find a unit vectors normal to the vectors
→
a
+
→
b
and
→
b
+
→
c
.
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