A spring is stretched by 9 in by a mass weighing 15 lb. The mass is...
A mass weighing 10 lb stretches a spring 11 in. The mass is attached to a viscous damper with damping constant 3 lb ·s/ft. The mass is pushed upward, contracting the spring a distance of 4 in, and then set into motion with a downward velocity of 2 in/s. Determine the position u of the mass at any time t. Use 32 ft/s as the acceleration due to gravity. Pay close attention to the units. u(t) =
A mass weighing 11 lb stretches a spring 8 in. The mass is attached to a viscous damper with damping constant 3 lb-s/ft. The mass is pushed upward, contracting the spring a distance of 2 in, and then set into motion with a downward velocity of 6 in/s. Determine the position u of the mass at any time t. Use 32 ft/s as the acceleration due to gravity. Pay close attention to the units. u(t) =
A mass weighing 9 lb stretches a spring 8 in. The mass is pulled down an additional 7 in and is then set in motion with an initial upward velocity of 2 ft/s. No damping is applied. a. Determine the position u of the mass at any time t. Use 32 ft/s as the acceleration due to gravity. Pay close attention to the units. u(t) = 5 cos (4 3 t) + sin(4V3 t) 2V3 b. Determine the period, amplitude...
< Pre A mass weighing 18 lb stretches a spring 6 in. The mass is attached to a viscous damper with damping constant 4lb-s/ft. The mass is pushed upward, contracting the spring a distance of 4 in, and then set into motion with a downward velocity of 5 in/s. Determine the position u of the mass at any time t. Use 32 ft/s” as the acceleration due to gravity. Pay close attention to the units. u(t) = in
3. < Previous Ne A mass weighing 9 lb stretches a spring 4 in. The mass is pulled down an additional 3 in and is then set in motion with an initial upward velocity of 6 ft/s. No damping is applied. a. Determine the position u of the mass at any time t. Use 32 ft/s as the acceleration due to gravity. Pay close attention to the units. u(t) = ft b. Determine the period, amplitude and phase of the...
A mass weighing 96 lb is attached to a spring hanging from the ceiling and comes to rest at its equilibrium position. At time t = 0, an external force of F(t) = 3 cos 3t lb is applied to the system. If the spring constant is 15 lb/ft and the damping constant is 4 lb-sec/ft, find the steady-state solution for the system. Use g = 32 ft /sec. The steady-state solution is y(t) = | |
A spring is stretched 6 m by a mass that weighs 8 kg. The mass is attached to a dashpot mechanism that has a damping constant of 0.25 Ns/m, and is acted on by an external force of 4 cos(2t) N. (a) Write down the IVP that describes the system. (b) Determine the steady-state response of this system (you may simply use the formula in the text and plug in the appropriate numerical coefficients). Note: You do not need to...
2. < Previous A mass that weight 6 lb stretches a spring 2 in. The system is acted on by an external force 5 sin ( 8V3t) lb. If the mass is pushed up 1 in and then released, determine the position of the mass at any time t. Use 32 ft/s’ as the acceleration due to gravity. Pay close attention to the units. u(t) = in
A mass that weight 14lb stretches a spring 1 in. The system is acted on by an external force 7 sin(8V6t) lb. If the mass is pushed up 1 in and then released, determine the position of the mass at any time t. Use 32 ft/s? as the acceleration due to gravity. Pay close attention to the units. u(t) = in
A mass weighing 8 lb stretches a spring 3 in. The mass is attached to a viscous damper with a damping constant of 2 lb-s/it. If the mass is set in motion from its equilibrium position with a downward velocity of 2 in /s, find its position at any time 1. Assume the acceleration of gravity g = 32 ft/s? e sin4/7 245 'sini 1 1 "costri 1 1 1 24 vi cos7+ 24/7 sin 45 "cosa + V7 sin...