Question

38)
Two forces of magnitude 8N make
angles of 30 and 120 with x-axis.
Magnitude of y-component of the
resultant will be:
A)zero
B)4N
C)8N
D)16N​

Answer 1

Answer:

Let the two forces be F1 and F2 = 10N

The Y component of F1 = F1 * sin(60°)

= 10 * 0.866025 = 8.66025N

The Y component of F2 = F2 * sin(120°)

= 10 * 0.866025 = 8.66025N

The total force acting vertically on the Y axis is therefore F1 + F2

= 8.66025 + 8.66025 = 17.3205N