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Math 12 Chapter 7
Vectors
Test - 11
1.
In any triangle ABC a = b Cos C + ………..
a) c Cos B
b) a Cos B
c) b Cos A
d) b Cos B
2.
Projection of U along V =………………
a) U . V/| V |
b) U . V/|U|
c) |U .V|/
V
d) |U . V|/
u
3.
Two vectors U And V are Collinear if θ =………………….
a) 0
b) Л
c) Л / 2
d) a and b
4.
Work Done =……………..
a) F . d
b) F . r
c) r . d
d) None of these
5.
If
V
= ai + bj + ck then projection of V along k =……………….
a)
c
b)
a
c)
b
d)
k
6.
If
V
= ai + bi + c k then projection of
V
along j =………
a) b
b) a
c) j
d) k
7.
U x V = ……………..
a) V x W
b) - V x U
c) W xU
d) - W x V
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