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- SCH 08 HW PSS 8.1: Static equilibrium problems To practice Problem Solving Strategy 8.1 Static equilibrium problems. When you at an object by moving only your forearm, the main lining muscle in your arm is the biceps. Suppose the mass of a forearm is 1.20 kg. If the biceps is connected to the forearm a distance du-3.50 cen from the elbow, how much force F must the biceps exert to hold a 750 g bal at the end of the forearm at distance du 30.0 ctn from the elbow, with the torearm parallel to the floor? How much force F must the elbow exert? (Doute 1) Figure dap Biceps Soull 1 of 1 Evaluate whether the answer you obtained for the force exerted by the biceps is reasonable ▾ Part J VAX Although it is uncommon, orthopedic surgeons have seen patients who have tom their biceps tendon when forces of greater than 390 N have been exeded on the tendon with the arm bent at the elbow so that the forearm is parallel to the ground. What is the minimum mass of a ball Af such a patient might have held…Quantity Trial 1 Trial 2 F1 (dynes) 93100 dyn 102900 dyn F2 (dynes) 68600 dyn 107800 dyn F3 (dynes) 102900 dyn 117600 dyn F4 (dynes) 34300 dyn 78400 dyn On a separate sheet of paper or graphing paper, using polygon method (one for each trial), connect all the forces F1, F2, F3 and F4. What is the resultant force? What do you observe?1.1 A four-cylinder diesel engine of 4-stroke type has stroke to bore ratio as 1.2 and the cylinder diameter is 12 cm. Estimate indicated power of the engine using the indicator diagram arrangement. Indicator card shows the diagram having area of 30 cm2 and length as half of stroke. Indicator spring constant is 20 x 103 kN/m2 and engine is running at 2000 rpm. Also find out mechanical efficiency of engine if 10% of power is lost in friction and other losses.
- (2) A 30° MK = 0.45 Мк G B MA= 1 = 2 ку .8 kg - In the above arrangement of two blocks and card, the blocks start Use PWE to at rest, and the pulleys are frictionless. Find VA (mag and direc) after may assume that the card tension You B has descended by 0.65 m. is constant. You will need to use NSL to relate N₁ to WA E=mAg), NA and you Should show all the steps of this preliminary step also.26 TAKE, TT =314, 9= 9 M=74-8 kg After your strenuous walk to the Rankine building, you decide to take the lift to the sixth floor. You enter the lift at tau 4,8 s with a load corresponding to your total mass (vettheallective haine) if you now consider a force applied due to gravity acting on you, with the spring stiffness of the lift cable being k 79703 N/m, the damping coefficient of the lift c 4760 Ns/m and the mass of the lift without any occupants of 811 kg, so that the deflection can be described as - 很 (t-7)-tan x(t) = What is the damped frequency (in radians/second) of the lift after you enter it? Answer Calculate the deflection when and walt -r)- tan Answer Q8 What would be the deflection at2. ! SHOW COMPLETE SOLUTION ! *pls draw FBD *pls use data give properly : rate will be low if not explained properly Problem 2: The pulleys are frictionless and of negligible weight Find: 2.1 Tension (N) in the cord supporting block C. 2.2 Acceleration at Block A (m/s^2) 2.3 Acceleration at Block B (m/s^2) 2.4 Acceleration at Block C (m/s^2)
- 1 ! SHOW COMPLETE SOLUTION ! * DRAW FBD *pls answer manually Problem 1: The pulleys are frictionless and of negligible weight A 250 kg 300 kg C B 450 kg Find: A. Tension (N) in the cord supporting block B. B. Acceleration at Block A (m/s^2) C. Acceleration at Block B (m/s^2) D.Acceleration at Block C (m/s^2)Q. 2: Method Planform Design You are to design candidate wings for a sport RC electric aircraft to the following requirements: density: p= 1.2 kg/m³ speed: lift: V. = 13.4 mph = 6 m/s L = 11 oz = 3.0N span: b = 63 in = 1.6 m Assume an elliptic load distribution I(y) = ToV1- (2y/b)² for each of the design cases below. Assume de /da = 2ñ for the wing airfoils. Assume the wing reference line (e.g. fuselage axis) is aligned with the flight direction, so that a = 0°. 2.1) Baseline elliptical wing: Assume a spanwise-constant c = 0.8. a) (Elliptic) Determine the chord distribution c(y) and sketch the planform. b) (Elliptic) Determine agero(y). c) (Elliptic) What will ageom (y) look like if the same cambered airfoil is used all across the span? d) (Elliptic) Determine the induced drag for this wing? What is the lift-to-drag ratio?Q.1 An externally contracting shoe brake shown below is actuated by a mechanism that exerts the same force F on each shoe. The shoes are identical and have a face width of b. The coefficient of friction of lining material is f. The maximum pressure on the lining material should not exit pa value. Using the following input data find a) The actuating force F. b) The total braking torque capacity of the brake. r=130 mm a=150 mm c=260 mm b=35 mm 01=30° 02=120° a=30° f=0.32 Pa=0.7 MPa Note that: Ssia*o. Je = - Singe +c (Sin ec S Sin 6. Cos 0.de = A B
- i need clear ans and solve very very fast in 20 min and thank you | DYBALA? i need clear ans and solve very very fast in 20 min and thank you | DYBALA ?*! pressurized vessel (closed ends) with 500 bar, its dimensions are L = 1m, d = 25 Cm, D = 32 Cm, oy = 600 MPa. Find maximum values for Oh, o, and as then find safety factor. light shocks find its1- A single plate clutch with both sides of the plate effective is required to transmit 25 kw at 100 r.p.m. the outer diameter of the plate is Limited to 300 mm and the intensity of pressure between the plates not to exceed 0.07 N/mm? . Assuming uniform wear and coefficient of the friction 0.3 , find the inner diameter of the plates and the axial force necessary to engage clutch . chaftTask 4: - a) The figure below shows the dimensionless plot for flat plate clutches comparing uniform wear and uniform pressure cases, where T is the torque, F is the force, f is the friction factor, D is the outside diameter and d is the inside diameter. Generate a similar plot for conical clutches taking into account the cone angle. JFD 0.5 - Uniform pressure Uniform wear 0.5 b) Consider a flat plate clutch with maximum pressure of 50 KPa, outside diameter of 30 cm and inside diameter of 20 cm. Calculate the operating force assuming uniform wear and uniform pressure.