Question

A Four bar chain ABCD has a fixed link AD = 700mm, the driving crank AB= 200mm, the driven crank CD = 400mm and the connecting link BC=900mm. Find the velocity and acceleration of Point ‘P’ midway between B and C when the angle BAD = 60⁰ and AB rotates anticlockwise at a uniform speed of 600 rpm.

Answer 1

Gives

AB=200mm

CD=400mm

BC=900mm

Angle ( BAD)=60°

Speed $(w)=2\pi n$

$w=\frac{2\pi \times600}{60}=20\pi$ rad/sec

r=AB=0.2m

$$v=rw=0.2\times20\times3.14=12.56m/sec$$

$$a_c=\frac{v^2}{r}=\frac{12.56^2}{0.2}=788.768m/sec^2$$