plzz ans all these questions tomorrow is my test
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Answer of part (ii) is d..
(5i+7j-3k).(2i+2j-ck)=cos90
C= - 8
(5i+7j-3k).(2i+2j-ck)=cos90
C= - 8
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hey, mate here is ur Ans
we know that when two vectors are perpendicular the angle between them is 90
and it's dot product is always =0
Ã. B=10+14+3c
Ã.B=0
-24/3=c
c=-8
Q.2
friction force:- it is that forces which opposes the cause of motion.
so, it must acts opposite to the direction of velocity/speed.
so, angle between them is 180
we know that when two vectors are perpendicular the angle between them is 90
and it's dot product is always =0
Ã. B=10+14+3c
Ã.B=0
-24/3=c
c=-8
Q.2
friction force:- it is that forces which opposes the cause of motion.
so, it must acts opposite to the direction of velocity/speed.
so, angle between them is 180
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