The slender uniform bar with a weight of 9 lb can rotate in a
vertical plane with respect to a bolt B. A spring of constant k =
40 lb / ft and an undeformed length of 5 in is connected to the bar
as shown . If the bar is released from rest in the position shown,
determine after rotating 90 °:
A) The initial energy of the spring:
B) Final spring energy:
C) The velocity of the G point of the Bar
D) The angular velocity of the BD bar
The slender uniform bar with a weight of 9 lb can rotate in a vertical plane...
A slender 9 lb rod can rotate in a vertical plane about a pivot at B. A spring of constant k-30 lb/ft and of unstretched length 6 in. is attached to the rod as shown. The rod is released from rest in the position shown. 1) Determine its angular velocity after the rod has rotated through 45.(1 point) 2) Determine the reaction force at pivot point B after the rod rotated through 45. (1 point) 24 in 5 in. 4...
Include a constant counter clockwise moment of 40 lb.ft A slender 9-lb rod can rotate in a vertical plane about a pivot at B. A spring of constant k 30 lb/ft and of unstretched length 6 in. is attached to the rod as shown. Knowing that the rod is released from rest in the position shown, determine its angular velocity after it has rotated through 90 Fig. P17.18 24 in 5 in. 14in.
CLASS ID#: (3) GIVEN: (35 PTS) A slender 9-Ib rod AC can rotate in a vertical plane about a pivot at B. Attached to the rod at C is a spring with a stiffness of k=30 lb/ft and an unstretched length 6 inches. The rod is released from rest in the position shown. FIND: (A) (-10 Pts) The ANGULAR VELOCITY (c) of the rod AC after it has rotated through 90° (B) (-10 pts) The corresponding REACTION at the pivot...
The spring is uncompressed when the uniform slender bar is in the vertical position shown. Determine the initial angular acceleration a of the bar when it is released from rest in a position where the bar has been rotated clockwise 33° from the position shown. Neglect any sag of the spring, whose mass is negligible. The angular acceleration is positive if counterclockwise and negative if clockwise. The mass m of the bar is 18 kg, the length / is 305...
The uniform slender bar ABC weighs 5.2 lb and is initially at rest with end A bearing against the stop in the horizontal guide. When a constant couple M = 72.3 lb-in. is applied to end C, the bar rotates causing end A to strike the side of the vertical guide with a velocity of 10.9 ft/sec. Calculate the loss of energy ΔE (enter a positive number) due to friction in the guides and rollers. The mass of the rollers...
1. The slender bar AB weighs 60 lb and moves in the vertical plane, with its ends constrained to follow the smooth horizontal and vertical guides. If the 30 - Ib force is applied at A with the bar initially at rest in the position for which =30°, calculate the resulting angular acceleration of the bar and the forces on the small end rollers A and B. // 2 BO
The 0.2-lb bar is released from rest in the position shown. Find the angular velocity of the bar when it reaches a position 30° below horizontal. The spring has a stiffness of 4.5 lb/ft and an undeformed length of 2 in. (50) -5.00 in -3.00 in Owo A B с ud
D L/2 G L/2 B MO A uniform slender rod of mass M=10 kg and length L=3m, is hinged at A. The rod is held in a horizontal position against А the spring (k= 200kN/m) at G, the spring being in compression. When the rod is released from this horizontal position k Rigid (the spring is not connected to the rod), support it will rotate about the frictionless hinge Spring A in a vertical plane. Determine: support a. The minimum...
Prob. 4 Consider a slender uniform homogeneous bar of total length 1.5 m and mass 4.5 kg that is bent and welded to form the equilateral triangular object supported at a hinge in a vertical plane as shown. If the angular velocity is constant at 5 rad/s, determine the components of the reactions at the hinge Prob. 4 Consider a slender uniform homogeneous bar of total length 1.5 m and mass 4.5 kg that is bent and welded to form...
The 6.0-lb bar is pinned at its center O and connected to a torsional spring. The spring has a stiffness k = 5.6 lb?ft/rad , so that the torque developed is M=(5.6?)lb?ft, where ? is in radians. If the bar is released from rest when it is vertical at ?=90?, determine its angular velocity at the instant ?=45?.