Question

Write a force of `10 N ` in x-y plane in terms of unit vectors `hat(i)` and `hat(j)` if it makes an angle `30^(@)` with x-axis as shown in figure :-

A. `5sqrt(3)hat(i)+5hat(j)`
B. `5hat(i)+5sqrt(3)hat(j)`
C. `5hat(i)-5sqrt(3)hat(j)`
D. `5sqrt(3)hat(i)-5hat(j)`

Answer 1

Correct Answer - A
`10(cos 30^(@))hat(i)+sin 30^(@)hat(j))=(5sqrt(3)hat(i)+ 5hat(j))`