- #1
Northbysouth
- 249
- 2
Homework Statement
Point A is given a constant acceleration a to the right starting from rest with x essentially zero. Determine the angular velocity w of link AB in terms of x and a.
I have attached an image of the question
Homework Equations
w = θ'
α = θ''
Pythagoras and trig
The Attempt at a Solution
x = 2bcos(θ)
x' = -2bθ'sin(θ)
x'' = -2bθ''sin(θ)-2bθ'2cos(θ)
a = -2bαsin(θ) - 2bw2cos(θ)
I know that bsin(θ) = √b2-x2/4
and I know that bcos(θ) = x/2
Substituting these is
a = -2α√b2-x2/4 - 2w2x/2
After here is where I get stuck. I'm not sure how to deal with the angular acceleration α. I can see that I have part of the final answer (shown in the image) but I'm not sure about the last few steps.
Any help would be appreciated. Thank you