Question

1. A vector have a magnitude of 5 units and makes an
angle of 30° with the positive x axis, then Horizontal
component of the vector is?
a. 5
b.5/2
c. 5√3 /2
d. 5√3
​

Answer 1

Explanation:

Horizontal component = v×costheta

Here Theta=30°

cos30°=√3/2

v×costheta = 5√3/2

Answer 2

ANSWER IS C 5√3/2.

EXPANATION

In case of vectors the horizontal component is the side on which it forms the angle . in this case the angle is 30 degrees so,

The horizontal component will be,

5cos30 ( since 30 with horizontal so it will be cos)

=5×√3/2

=5√3/2