Question

0) Crank AB rotates with known constant angular velocity a clockwise. Determine the acceleration of the piston P when =30°. (1 and b are given) 00 DO A

Answer 1

When w, b and l are given, then acceleration of pistion is given by the ap. Note that the direction of w is clockwise. So, the acceleration ap is towards A from D.

Acceleration of piston is given by Qp = W2x [cou + cos20.7. Where. "W: angellar velocity anglilar velocity of crank : radilcs of Crank. 0 : angle of potation of Vrank. Here, 10 = 30° bi n = 6 w2o cos 30° + cos 60 ap = w²b [0.866 + 0.5 bli r = a a AB Since w is in clockwise direction, ap is in the direction of A from D.