Question 1: A 200 kg block is attached to a spring of stiffens 50 kN/m is...
1. A suspension system shown in the figure is modified by adding two additional springs each with a spring constant of k, kN/m in addition to the other existing three springs with k 90 kN/m each. The design also adds two additional dampers in addition to the two existing dampers each with the same viscous damping coefficient c (= 4000 Ns/m). The viscous damping ratiofor the underdamped system, 7 is 0.95. The mass of the system, m = 150 kg....
QUESTION 4 (140 marks) Determine the damped frequency of the spring-mass system schematically illustrated below if the spring stiffness is 3000 N/m and the damping coefficient c is set at 320 Ns/m. If a periodic 260 N force is applied to the mass at a frequency of 2 Hz, determine the amplitude of the forced vibration. Spring Viscous damper 35 kg Figure 4
. A 200 kg block is attached a the lever AO as shown in the figure. If the stiffiess of the spring is 50 kN/m and the spring is at its natural length when 6-0 find the position (or positions) of equilibrium. 1 = 200 mm m = 200 kg r75 mm k = 50 kN/m-' , Note: in problems l and 2 take the gravity as g=9.81 m/s pointing down
A 200 kg machine is mounted, at first, on an undamed spring. During operation the machine has an unbalanced rotating component. When the system is operated at a variety of frequencies the machine had an unbounded response at 40 Hz. At 400 Hz the steady-state amplitude was 3.0 mm. (a) What is the stiffness of the mounting? (b) What is the magnitude of the rotating unbalance? (c) The machine of part (a) is mounted on the same spring in parallel...
6-B) A weight attached to a spring of stiffness 982 N/m has a viscous damping device. When the weight is displaced and released, the period of vibration is 1.02 s, and the magnitude of consecutive amplitudes is 0.61 m and 0.29 m. a) Identify the mass (m) and damping (c) coefficient. b) Determine the amplitude and phase of the response when a force, f(t) = 4.2 cos (6.31) N, acts on the system.
1) A block of mass m = 0.52 kg is attached to a spring with force constant 119 N/m is free to move on a frictionless, horizontal surface as in the figure below. The block is released from rest after the spring is stretched a distance A = 0.13 m. (Indicate the direction with the sign of your answer. Assume that the positive direction is to the right.) (a) At that instant, find the force on the block. N (b)...
10. A 0.600-kg wood block is firmly attached to a very light horizontal spring k 200 N/m as shown in the figure. It is noted that the block-spring system, when compressed 5.00 cm and released, stretches out 4.00 cm beyond the equilibrium position before stopping and turning back. What is the coefficient of kinetic friction between the block and the table?
Vibrations (don’t have pic) There is a 1-DOF system that has mass 1 kg, spring stiffness 100 N/m. Q: Free vibration was done to the system and the magnitude of the vibration decreased by 10% per period. How much is the damping coefficient?
A block of mass m = 1.07 kg is attached to a spring with force constant 134.0 N/m. The block is free to move on a frictionless, horizontal surface as shown in the figure. The block is released from rest after the spring is stretched a distance A = 0.15 m to the right. What is the potential energy of the spring/block system 0.28 s after releasing the block?
A block of mass m = 1.23 kg is attached to a spring with force constant 157.0 N/m. The block is free to move on a frictionless, horizontal surface as shown in the figure. The block is released from rest after the spring is stretched a distance A = 0.11 m to the right. What is the potential energy of the spring/block system 0.28 s after releasing the block?