WorksheetsMotion in a Plane
Total questions: 9
Worksheet time: 5mins
Name
Class
Date
1.
The value of (i-j).(2i-j+k) is:
a)
-3
b)
+3
c)
0
d)
2
2.
If the dot product of two vectors is 0 then the angle between them (in degrees) will be:
a)
0
b)
180
c)
60
d)
90
3.
The magnitude of vector i-j-k is
a)
-1
b)
+1
c)
3
d)
none of these
4.
The angle betweeen the vectors (i+j) and (-i+j) (in degrees) is:
a)
0
b)
45
c)
90
d)
180
5.
The value of x, so that xi+0.4j+0.8k is a unit vector is:
a)
1
b)
2
c)
-0.2
d)
0.2
6.
A vector when added to 2i-j+k and -i-j+k gives null vector. The vector is:
a)
i-2j+2k
b)
-i+2j-2k
c)
2i-2j+2k
d)
2i-j+2k
7.
The angle made by a vector i+j with y axis is:
a)
00
b)
450
c)
600
d)
900
8.
The angle between two equal vectors so that there resultant is equal in magnitude of either,will be:
a)
450
b)
600
c)
900
d)
1200
9.
Choose the incorrect option:
a)
A . B = B . A
b)
i.j=0
c)
k.k=0
d)
j.j=1
100 %
