22-57. The electric motor turns an eccentric flywheelwhich is equivalent to an unbalanced 0.25-lb weight located10 in. from the axis of rotation. If the static deflection of thebeam is 1 in. because of the weight of the motor, determinethe angular velocity of the flywheel at which resonance willoccur. The motor weighs 150 lb. Neglect the mass ofthe beam.

Answered: Image /qna-images/answer/c68263e1-ea49-4421-9744-9c9850e40c8e.jpg

Answered: 22-57. The electric motor turns an…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The system shown below consists of a uniform disk D that has a mass of mp = 3.0 kg and a radius of r = 0.5 meters. The disk is connected by a massless cable to a block. The system is released from rest and the disk starts rolling without sliding with the angular acceleration of a = 24 rad in the clockwise direction. Determine the tension developed in the cable (in Newtons) at this instant. Consider 0 = 30° and g 10 * mp
The wheel is attached to the spring. The mass of the wheel is m=20 kg. The radius of the wheel is 0.6m. The radius of gyration KG=0.4 m. The spring's unstretched length is Lo=1.0 m. The stiffness coefficient of the spring is k=2.0 N/m. The wheel is released from rest at the state 1 when the angle between the spring and the vertical direction is 8-30°. The wheel rolls without slipping and passes the position at the state 2 when the angle is 8-0°. The spring's length at the state 2 is L2=4 m. (10) The kinetic energy at the state1?__ (N-m) (two decimal places) LLLLLLL L₂ State 2 C State 1
Note that when θ=0, it is initially at rest. Applying moement θ=30: a. Find ω and α b. Find reaction at B What I have so far: FBD w/ tangential and normal ΣFt = ΣFt α= (dω/dt) = (dω/dθ)= (dθ/dt) α= ω(dω/dθ) ∫ωdω = ∫α dθ (solve for ω) ΣM/A = ΣM/A
The 10kg rod has a moment of inertia which is computed from Iç =ml². If it is rotating at w = 2, determine its kinetic energy () when it is computed about the mass center G. u-irade
The wheel is attached to the spring. The mass of the wheel is m=20 kg. The radius of the wheel is 0.6m. The radius of gyration KG=0.4 m. The spring's unstretched length is Lo=1.0 m. The stiffness coefficient of the spring is k=2.0 N/m. The wheel is released from rest at the state 1 when the angle between the spring and the vertical direction is 8-30°. The wheel rolls without slipping and passes the position at the state 2 when the angle is 8=0°. The spring's length at the state 2 is L2=4 m. (11) The angular velocity at the state 2?_ _(rad/s) (two decimal places) 111441 L₂ State 2 State 1
*21-40. Derive the scalar form of the rotational equation of motion about the x axis if N + w and the moments and products of inertia of the body are not constant with respect to time.
Example: 18-63. The uniform 80-lb garage door is guided at its ends on the track. If it is released from rest at 0 = 0º, determine the door's angular velocity at the instant = 30°. The spring is originally stretched 1 ft when the door is held open, 0 = 0°. Assume the door can be treated as a thin plate, and there is a spring and pulley system on each of the two sides of the door. Solution: 8 ft A 8 ft B k = 9 lb/ft
The radius of the pulley is of inertia is I = 0.1 kg-m2. R = 100 mm The mass stant is k = 135 N/m. m = 5 kg. and its moment The spring conThe system is released from rest with the spring unstretched. What maximum distance does the mass fall before rebounding?
The following mass-and-spring system has stiffness matrix K. The system is set in motion from rest (x1′(0)=x2′(0)=0)in its equilibrium position (x1'(0)=x2'(0)=0) with the given external forces F1(t)=0and F2(t)=540 cos 4t acting on the masses m1and m2,respectively. Find the resulting motion of the system and describe it as a superposition of oscillations at three different frequencies. m1 m2 k1 k2 k3 x1 x2 K= −k1+k2 k2 k2 −k2+k3 m1=1, m2=2; k1=1, k2=2, k3=2 Find the resulting motion of the system. x1(t) = x2(t) = (Type exact answers, using radicals as needed.)
Consider the system shown at right. Find an equation of motion for the block with mass m,. Assume that the small wheel has negligible mass moment of inertia and that the larger one has a radius R and a mass moment of inertia I (measured respect to its axis of rotation). Note that there is a friction between the block with m2 mass m2 and the plane. The dynamic friction coefficient is equal to µa. m1 Md
Which one is correct please?
"Using a 1-kg load at a specified joint, your experiment displayed that the bottom chord experienced a tensile force FBC of 2.60 N. If your computations showed that FBC is equal to 2.99 N (tensile), what is the percentage error?" A 19.33% B 5.17% c) 5.45% -5.17%

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