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Byju's Answer
Standard XII
Physics
Acceleration in 2D
Write vector ...
Question
Write vector relation between angular velocity
(
→
ω
)
, tangential velocity
(
→
V
)
and position vector
(
→
r
)
.
Open in App
Solution
Any quantity or an unit that has direction are called as vector units
.
Here
,
The angular velocity is directly proportional to the product of tangential velocity and position vector
.
That is
,
the angular velocity is equal to the tangential velocity if and only if they are equal in magnitude and in direction
.
The relationship
,
A
n
g
u
l
a
r
v
e
l
o
c
i
t
y
=
Tan
g
e
n
t
i
a
l
v
e
l
o
c
i
t
y
×
p
o
s
i
t
i
o
n
v
e
c
t
o
r
w
=
v
×
r
The relationship holds true if and only if they are equal in magnitude and in direction
.
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Similar questions
Q.
Write vector relation between angular velocity
(
→
ω
)
,
tangential velocity
(
→
v
)
and position
vector
(
→
r
)
.
.
Q.
Assertion:
Vector product of two vectors is an axial vector.
Reason:
For a body under rotation, if
→
v
=
instantaneous velocity,
→
r
=
radius vector and
→
ω
=
angular velocity, then
→
ω
=
→
v
×
→
r
.
Q.
In the figure shown below,
→
ω
is angular velocity and
→
r
is position vector. What is the direction and magnitude of linear velocity.
Q.
The velocity of the rotating body is given by
→
V
=
→
ω
×
→
r
,
where
→
ω
is the angular velocity and
→
r
is the radius vector. The angular velocity of a body is
→
ω
=
^
i
−
2
^
j
+
2
^
k
and the radius vector
→
r
=
4
^
j
−
3
^
k
,
then
|
→
V
|
is
Q.
In planetary motion the areal velocity of position vector of a planet depends on angular velocity
ω
and the distance
r
of the planet from sun. If so, the correct relation for areal velocity is:
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