Consider the mechanism composed of Bar AB, Bar BC, and Roller C. Roller C is constrained to move along the vertical. At the instant shown, Bar AB has a constant angular velocity of 1.5 rad/s CCW 1. Which of the following is undergoing General Planar Motion? 2. Which of the following is closest to the velocity at point B? 3. Which of the following best approximates the velocity at point C? 4. Which of the following approximates the location of Instantaneous Center of Rod BC?

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"

Rod AB is attached to the rotating arm using ball-and-socket joints as shown in (Figure 1). AC is rotating with a constant angular velocity of WAC = 8.5 rad/s about the pin at C. Assume d = 5 ft. Figure 2 ft 1.5 ft 3 ft B do @AC 1 of 1 Part Determine the components of the angular velocity of link BD at the instant shown. Enter your answers in radians per second to three significant figures separated by commas. (WDB)x, (WDB)y, (WDB)z = Submit Provide Feedback Request Answer VE ΑΣΦ ↓↑ vec ? rad/s Next >

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?

The flywheel shown has an angular velocity of 600 rpm. The connecting rod AB slides through the pivoting collar at C. When 0= 45°, find @AB, the angular velocity of AB. Hint: The direction of the velocity of the bar AB at a point directly under C is parallel to the collar C. That direction can be found from trigonometry. A 16" B

Another very common basic mechanism is the "four-bar" (the ground is considered one of the bars). The class has designed this demonstration four-bar with dimensions 2.2ft , 4.6ft and 1.0ft . In the position shown, coupler BC is horizontal, rocker CD is vertical and are easily found), and crank AB is rotating at a constant angular (therefore dimensions velocity of 11.8 rad/s Determine the angular velocity of rocker CD. NOTE: Magnitude should be entered here, direction in part 2 of this problem. A LAB WAB B 0A counterclockwise. LAD LBC D LCD

The double gear shown in Figure: Q 6(b) rolls on the stationary lower rack; the velocity of its center A is 1.4 m/s directed to the right and an acceleration of 3.2 m/s² to the right. If the lower rack is stationary, determine (i) the angular acceleration of the gear and (ii) the acceleration of points B, C, and D of the gear. B R VA=1.4 m/s D aa=3.2 m/s² = 160 mm ľ2= 110 mm Figure: Q 6(b)

At the instant shown in (Figure 1), rod AB has an angular velocity WAB = 2.2 rad/s and an angular acceleration AB = 10 rad/s². The collar at C is pin-connected to CD and slides over AB. Part A Determine the angular velocity of rod CD at this instant. Express your answer in radians per second to three significant figures. Enter positive value if the direction of velocity is counterclockwise and negative value if the direction of velocity is clockwise. Figure 60° WAB αAB 0.75 m Do 0.5 m 1 of 1 ΜΕ ΑΣΦ. Η vec WCD= Submit Request Answer Part B ? rad/s Determine the angular acceleration of rod CD at this instant. Express your answer in radians per second squared to three significant figures. Enter positive value if the direction of acceleration is counterclockwise and negative value if the direction of acceleration is clockwise. αCD= Η ΜΕ ΑΣΦ VAΣ IT vec Submit Request Answer B < Return to Assignment Provide Feedback ? rad/s²

(Three-Dimensional Motion) The figure below represents a pair of bevel gears A and B. Gear A rotates in ahorizontal plane about a vertical axis at O. Gear B rotates around the shaft OC which in turn rotates about the terminal axis at O. determine the angular accelera tion of gear B when gear A is stationary and member OC has an angular velocity of 10j rad/sec and and angular acceleration of 25j rad/sec2 .

first 3 parts