Glven: The mechanism shown below is made up of links OA and AB. Point O is pinned to ground Point B is constrained to move along a straight-line path. At the instant shown, link OA is ver- tical, link AB is horizontal, and vn is travelling at a constant speed of 5 m/s in the direction shown. "ind: At this instant: a) The angular velocity of links OA and AB. ) The angular acceleration of links OA and AB.

The combined pulley shown has two cables wound around it at different diameters and fastened to point A and block E, respectively. Member ABOCD rotates counter clockwise to lift block E. If the total acceleration of point D is 5 in/s²Z45° at the instant shown, determine: a) the angular velocity of member ABCD3; b) the angular acceleration of member ABCD; c) the velocity of block E. Ø5" F Ø3" 5" B C, E 4" 8" 4"

MMZMUEN www.engineeringor 382 CHAPTER 16 PLANAR KINEMATICS OF A RIG FUNDAMENTAL PROBLEMS F16-19, Atthe instant shown, end A of the rod has the velocity and acceleration shown. Determine the angular acceleration of the rod and acceleration of end B of the rod. =5mx T16-241 ecar rolls orn the fixed ack with an ancular velocity ot ial and anguta acceleration of 64MP AI QUAD CAMERA Shot by Shireen Inamdar

The lower portion of a fire ladder (OA) rotates about the hinge at O at a rate of 0.05 rad/s. The angular acceleration of OA is 0.04 rad/s?. At the same time, the upper portion (AB) extends out from the lower portion at a velocity of 0.4 m/s and an acceleration of 0.1 m/s?. The length of OA is 6 m and the length of AB is 2m. a) Calculate the velocity and acceleration of point B with respect to O. Keep your work in polar coordinates. b) Transform your solutions from Part (a) to Cartesian coordinates if 0 = T1/6. A 36°F Clear Type here to search 53

The system shown in the figure is composed of bar AB which is pin-supported at A and attached to bar BC. The end of bar BC is connected to the slider block C.  At the instant shown, the acceleration of point B is 1.125 m/s2 downward and the angular velocity of bar BC is 0.5625 rad/s counterclockwise.   What is the angular acceleration of bar BC?

A and B

5. For the following pin-collected link assembly, link AO is pinned at point O, and moves with angular velocity w and angular acceleration a (both counterclockwise). 6) if W = 5.3 rad/s and Q = 7.0 rad/s?, length I = 1.8 m, and angle 0= 36°, what is the angular acceleration of link AB in rad/s?? Please pay attention: the numbers may change since they are randomized. Negative must be included if it is clockwise. Your answer must include 2 places after the decimal point. 0.5 m O, a

= A) Knowing that angular velocity of link AB is WAB 4 rad/s, determine the velocity of the collar at C and the angular velocity of link CB at the instant shown. Link CB is horizontal at this instant. 45° WAB = -350 mm 4 rad/s Figure 1 B 500 mm b) Recently, there have been some concerns raised about the door opening system's safety, as it operates at a relatively fast speed, posing a serious hazard for people using wheelchairs. As a co- op student working with the door manufacturing company, your task is to propose a modification to the Linkage system of CBA that allows the door to open and close more slowly, ensuring that point C moves at a reduced speed. Providing a more comfortable and secure experience for individuals, including those using wheelchairs. Note: You may use further calculations or just use your steps in part A to suggest a change and justify it.

1. At the time the crank AC is at 30° the collar is 6" from point A and crank BC is horizontal. The crank AC is rotating at 3 rad/s counter clockwise. The collar C is free to slide on the frictionless crank AC. What is the total acceleration of point C? 3" В A

only HANDWRITTEN answer needed ( NOT TYPED)