Chapter 12, Problem 160P

If the compact disc is spinning at a constant angular rate θ˙ = 445 rev/min, determine the magnitudes of the accelerations of points A and B at the instant shown. Determine the magnitudes of the velocities of points A and B.

Two pulleys are fixed to each other and driven by a belt. When the belt reaches the velocity of v=0.6 m/s, the total acceleration of point P is 8 m/s. Determine the acceleration of point B at that instant.

The bent flat bar rotates about a fixed axis through point O. At the instant when 0 = 30°, the bar has a clockwise angular velocity and the acceleration of point A on the bar is āд −4.2ĵ ft/sec². = If ẞ = 120°, b = 3 ft, and c = 2 ft, determine the vector of velocity of point A for that instant. (A = 3.08 -2.28 ft/sec) y x β b Ꮎ A C

At the instant shown, the shaft and plate rotates with an angular velocity of 19 rad/s and angular acceleration of 9 rad/s². (Figure 1) Figure X D 0.4 m B 0 0.4 m a 0.3 m < 1 of 1 0.6 m 0.2 m C 0.3 m Part A Determine the velocity of point D located on the corner of the plate at this instant. Enter the x, y, and z components of the velocity in meters per second to three significant figures separated by commas. ► View Available Hint(s) (UD), (UD)y, (UD) z = 6.51,4.89,1.63 m/s Submit Previous Answers ✓ Correct Here we learn how to determine the velocity of a point on a rigid body revolving with an angular acceleration about a fixed axis in three dimensions. Part B Determine the acceleration of point D located on the corner of the plate at this instant. Enter the x, y, and z components of the acceleration in meters per second squared to three significant figures separated by commas. ► View Available Hint(s) (ap)z, (ap)y, (ap)₂ = [Π ΑΣΦ | ↓↑ vec Submit Previous Answers X Incorrect; Try…

The plate OAB forms an equilateral triangle with sides of S = 225 mm which rotates counterclockwise with increasing speed about point O. If the normal and tangential components of acceleration of the centroid C at a certain instant are 118 m/s? and 43 m/s², respectively, determine the value of de/dt in rad/s at this same instant. The angle e is the angle between line AB and the fixed horizontal axis. В C.

At the instant shown, the tower crane rotates about the z axis with an angular velocity ω1=0.25rad/s, which is increasing at 0.6 rad/s2. The boom OA rotates downward with an angular velocityω2=0.4 rad/s, which is increasing at 0.8 rad/s2. Determine,the Velocity Accelerationof point A located at the end of the boom at this instant.

A disk oscillates about its axis of rotation given by its angular acceleration of ∝ = -kθ. First determine the value of k for which,  w= 16 rad/s when θ = 0 and θ = 6 radians when w= 0. Then determine the angular velocity when θ = 1.2 radians.

2 Determine the angular velocity of links AB and BC at the instant 0 = 30°. Also, sketch the position of link BC when 0 = 55°, 45°, and 30° to show its general plane motion. B 1 ft 3 ft °c = 6 ft/s

The member OA of the industrial robot telescopes and pivots about the fixed axis at point O. At the instant shown, 0 = 60°, 6 = 1.2 rad/s, 60.8 rad/s2, OA = 0.9 m, OA 0.5 m/s, and OA = -6 m/s2. Determine the magnitudes of the velocity and acceleration of joint A of the robot. Also, sketch the velocity and acceleration of A and determine the angles which these vectors make with the posi- tive x-axis. The base of the robot does not revolve %3D about a vertical axis. 1.1 m. 0.9 m 15° P