Question

A 10-lb block sits on a plane that is inclined at 60◦above the horizontal. The heightof the plane decreases from left to right. The gravitational force acting on the blockis~F.Make an illustration and work with 2-D vectors to answer the following:

What is a unit vector that points down the plane (parallel to the plane)?

Answer 1

It is shown in the pic.

Explanation:

We can call this unit vector u, that points down the plane (parallel to the plane) and v is an unit vector that points in a direction that is normal to the plane.