Suppose that a car weighing 4000 pounds is supported by four shock absorbers each shock absorber has a spring constant of 6500 ibs/foot, so the effective spring constant for the system of 4 shock absorbers is 26000 lbs/foot damping and determine the period of oscillation of the vertical motion of the car. hint: g= 32 ft/sec2 1. assume no t = 0.436 seconds 2. after 10 seconds the car body is 1/3 foot above its equilibrium position and at the high point in its cycle. what were the initial conditions? ft/sec y(0) 0.317 ft. and y'(0) -1.481 x 3. now assume that oil is added to each the four shock absorbers so that, together, they produce an effective damping force of - 6.93 lb-sec/ft times the vertical velocity of the car body. find the displacement y() from equilibrium if y(0) 0 ft and _ y'(0)= -10 ft/sec y4.41e0027'sin(3.8t + t) | x

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical