Question

1.
The projection of a vector in a particular direction is called
a) Magnitude of vector
b) Direction of vector
c) Component of vector
d) Resultant of vector
2.
d) 7
3.
A force is represented by F = (2i +3j +6k)N. The magnitude is
a) 29
b) 141
c) 5
Among the following a vector in the fourth quadrant can be written as
a) ai + bj
b) ai – bj
c) –ai + bj d) – ai – bj
The angle made by the vector (i + i) with x - axis is
a) 30°
b) 45°
c) 60°
d) 90°
4.​

Answer 1

Answer:

1》 option c is the correct answer.

2》question is not complete.

3》(2i+3j+6k)N

F=[(2)^2+(3)^2+(6)^2]^1/2

F=[4+9+36]^1/2

=(49)^1/2

=7N

Option d is correct.

4》option b is correct. ai-bj

5》i think the vector is (i+j)

Thus option b 45° is correct as tanΘ=1