Mechanics velocity of disc question

[themster]

Homework Statement

The disc rolls without sliding on the curved surface. What is the velocity of point A attached to the disc?
Ans: 1.69 m/s, directed at 45o upwards.

Homework Equations

v=ωR

The Attempt at a Solution

v=ωR = 10rad/s * 40mm

 

[tiny-tim]

hi themster!

use vector addition for the relative velocities (disc-arm and arm-earth) …

show us what you get ​