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Byju's Answer
Standard XII
Physics
Relation between Linear and Angular Speed
[ Write vecto...
Question
Write vector relation between angular velocity
(
→
ω
)
,
tangential velocity
(
→
v
)
and position
vector
(
→
r
)
.
.
A
vector
=
→
v
=
−
→
6
w
×
→
r
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B
vector
=
→
v
=
→
w
×
→
r
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C
vector
=
→
v
=
−
→
2
w
×
→
r
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D
vector
=
→
v
=
−
→
3
w
×
→
r
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Solution
The correct option is
B
vector
=
→
v
=
→
w
×
→
r
2
s
=
v
2
t
2
θ
=
v
2
t
r
2
θ
2
t
=
v
r
Angular velocity(w)
=
v
r
∴
v
=
r
w
vector
=
→
v
=
→
w
×
→
r
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0
Similar questions
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
→
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=
angular velocity, then
→
ω
=
→
v
×
→
r
.
Q.
Write vector relation between angular velocity
(
→
ω
)
, tangential velocity
(
→
V
)
and position vector
(
→
r
)
.
Q.
Which of the following are meaningful
a)(u vector.v vector).w vector
b)u vector(v vector ×w vector)
c)u vector ×(v vector.w vector)
Q.
A particle is moving with constant speed
V
in a circle of radius
r
. The average acceleration vector (taken over a full circle) is
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
+
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^
k
and the radius vector
→
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^
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,
then
|
→
V
|
is
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