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If 
what is the angle between 
and 
- a)900
- b)300
- c)600
- d)450
Correct answer is option 'D'. Can you explain this answer?
If what is the angle between and
what is the angle between and a)
900
b)
300
c)
600
d)
450
|
Gaurav Kumar answered |
We know that for two vectors P and Q
P.Q = |P||Q| cos a
And PxQ = |P||Q| sin a
Where a is angle between them
When P.Q = PxQ
We get sin a = cos a
Thus a = 450
P.Q = |P||Q| cos a
And PxQ = |P||Q| sin a
Where a is angle between them
When P.Q = PxQ
We get sin a = cos a
Thus a = 450
so that the resultant vector is a unit vector along the y-axis is
The position vector of a particle is 
.The velocity of the particle is- a)Parallel to the position vector
- b)Perpendicular to the position vector
- c)Directed towards the origin
- d)Directed away from the origin
Correct answer is option 'B'. Can you explain this answer?
The position vector of a particle is .The velocity of the particle is
.The velocity of the particle isa)
Parallel to the position vector
b)
Perpendicular to the position vector
c)
Directed towards the origin
d)
Directed away from the origin
|
EduRev Class 9 answered |
As
therefore velocity of the particle is perpendicular to the position vector.
will be
is a 
, the angle between 
and y-axis is
then which of the following is NOT correct
Its length in XY plane is 
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