Q7 If arm AB has a constant clockwise angular velocity of 0.8 rad/s, arm BC has a constant angular velocity of 0.2 rad/s, and arm CD remains vertical, what is the acceleration of part D? 300 mm B |15°...

If arm ?? has a constant clockwise angular

velocity of 0.8 rad/s, arm ?? has a constant

angular velocity of 0.2 rad/s, and arm ??
remains vertical, what is the acceleration of

part ??

Extracted text: Q7 If arm AB has a constant clockwise angular velocity of 0.8 rad/s, arm BC has a constant angular velocity of 0.2 rad/s, and arm CD remains vertical, what is the acceleration of part D? 300 mm B |15° 170 mm \50° Strategy: The constraint that the arm CD remains vertical means that the angular velocity of the arm CD is zero. This implies that arm CD translates only, and in a translating, non-rotating element the velocity and acceleration at any point is the same, and the velocity and acceleration of arm CD in the velocity and acceleration of point C.. ap = ac = -135i – 144j mm/s²