Question

Can someone explain how do find the components of `vecD`?

Given:
`vecA`
Mass`=30g`
Direction`=10` degrees

`vecB`
Mass`=20g`
Direction`=150` degrees

`vecC`
Mass`=35g`
Direction`=225` degrees

Solve:

`vecA+vecB+vecC+vecD=0`

Answer 1

See below

Explanation:

Basically this is a closed loop vector. A 4 sided irregular polygon. Think of each side as lengths, where 30g =3 inches ( just arbitrary dimensions)

See image below:

Easiest way to resolve is by evaluationg the vertical and horizontal components for each vector and adding them up. I leave the math to you.

Vector A vertical: `3 sin10`
Vector B vertical : `2 sin 30`
Vector C vertical : `3.5 sin225`

Vector A horizontal: `3 cos10`
Vector B horizontal: `2 cos 30`
Vector C horizontal: `3.5 cos225`

So Vector D vertical component is =Sum of all vertical values

So Vector D horizontal component is =Sum of all horizontal values

You can now evaluate Vector D magnitude and angle.

As I said above, leaving the math to you.