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- A large bell is hung from a wooden beam so it can swing back and forth with negligible friction. The center of mass of the bell is 0.55 m below the pivot, the bell has mass 30.0 kg , and the moment of inertia of the bell about an axis at the pivot is 16.0 kg⋅m2. The clapper is a small, 1.8 kg mass attached to one end of a slender rod that has length L and negligible mass. The other end of the rod is attached to the inside of the bell so it can swing freely about the same axis as the bell. What should be the length L of the clapper rod for the bell to ring silently-that is, for the period of oscillation for the bell to equal that for the clapper? Express your answer using two significant figures.Find 0(theta) and W in the figure below where w1 = 15.0 N, w2 = 31.0 N, and ? = 64.0°, assuming that the arrangement is at rest. 0(theta)= W =A nylon siring has mass 5.50 g and length L = 86.0 cm. The lower end is tied to the floor, and the upper end is tied to a small set of wheels through a slot in a track on which the wheels move (Fig. P18.76). The wheels have a mass that is negligible compared with that of the siring, and they roll without friction on the track so that the upper end of the string is essentially free. Figure P18.76 At equilibrium, the string is vertical and motionless. When it is carrying a small-amplilude wave, you may assume the string is always under uniform tension 1.30 N. (a) Find the speed of transverse waves on the siring, (b) The string's vibration possibilities are a set of standing-wave states, each with a node at the fixed bottom end and an antinode at the free top end. Find the node-antinode distances for each of the three simplest states, (c) Find the frequency of each of these states.
- Calculate the angular frequency ω (in rad/s) with these numbers: k = 5100 N/m = 5100 kg/s2 m1 = 30 kg m2 = 25 kgThe arm of a starter is held in the "ON" position by means of an eleetromagnet. The torque exerted by the spring is 5 Nm and the effective radius at which the force is exerted is 10 cm. Area of each pole face is 2.5 cm? and each air gap is 0.4 mm. Find the minimum number of ampere-turns (AT) required to keep the arm in the "ON" position.?Known information: T= 0.204 s ω= 30.8 rad/s A = 5.66 *10^-2 m ϕ0 = 0.150 rad v_max = 1.74 m/s a_max = 53.7 m/s^2 E_total = 0.365 J Determine the position at t = 4.80 s (in appropriate units) x = ? Thanks
- A person bends forward to lift a load with his back. To see that this is not a good way to lift, we will find the large induced force R = Rx(i) + Ry(j) occurring in the spine by lifting a 200-N object. The spine and the upper body are represented as a uniform horizontal rod of weight 350 N, pivoted at the base of the spine. The erector spinalis muscle, attached at a point 2/3 of the way up the spine, maintains the position of the back with tension T. The angle between the spine and this muscle theta = 12 degrees. Find the magnitude of force R at the base of the spine.In the figure, a motor weighing 3000 N hangs on a chain attached by an O-ring to two other chains, one attached to the ceiling and the other to the wall. Calculate the tensile force acting on the chain attached to the wall. Consider that the weights of the chains and the ring are negligible.Which force causes the highest moment (clockwise and counterclockwise) about Point C?
- DD =25i need help to do it correctly the solution answered is available and even the answers for 25th in table i just need explanationhow to do it? please thank you! M person 80 kg safe m ladder 30 kg caution unsafe L/3 mass fraction 0.37878788 L mass fraction 0.86363636 Nfloor 1078 N Nwall max 270 N available Ff max 270 N available L/3 way up the ladder top of ladder DOB Theta deg radians Tan theta Cot theta mu required Ff required mu required Ff reqd 25 80 1.3962634 6 0.17632698 0.0668 72.0 0.1523 164.2Calculate the angular frequency.A lamp of mass mL = 23.0 kg hangs at the end of a rod of mass mR = 12.0 kg and length L = 1.60 m. The left end of the rod is attached to a hinged bracket fixed in a wall. A cable, also anchored to the wall, is connected to the rod at a point a distance d = 1.10 m from the wall. The cable makes an angle ? = 52.0o, as defined in the drawing, with the rod.Begin by drawing an extended free body diagram for the bar.Remember that since you do not know the magnitude or angle of the force on the hinge, you should draw the x and y components of this force separately. Also, you will assume that the rod is "uniform" and that you may think of its mass as being concentrated at the middle of the rod.Retain at least four significant figures in all calculated results that will be used in further calculations. Round only the submitted answers to three significant figures. Calculate the tension in the cable. HINT: It is easiest to use the hinge as the rotational axis when you apply the condition of…