Resolve force F1 and F2 into their components acting along u and v. 70° 45° F₂= 500 N V 30° F₁ = 300 N
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- Z YA F₁=150 lbf 60° 50° O FOA 200 lbf F₂=250 lbf 35° 25° OA=(8,-7,4) ft X Ans: FOAY = -123.26 lbf, F2x = 185.6 lbf, F₁2 = 75 lbfَQ1: To upgrade a ventilation system it is required that the air flow rate be increased from 200 m3/min to 300 m3/min. This is to be accomplished by increasing the angular velocity of the ventilation fan. If the current rpm=800, what rpm is required for the upgrade? What will be the power increase for the upgrade?Q1:Put the true or false in the statements following. 1-Density is measuring in (m/kg). 2-Mass flow rate is (A=r^2). 3-Pressure is measuring in (Pascal's). 4- Mass is measuring in (Kg). 5- K.E is formulas K.E=1/2mu^2. 6- P.E is formulas P.E=mgv. 7-dynamic viscosity =m/s. 8- Minor losses occur in loss of pressure. 9- Minor losses occur in Head pipe. 10. Minor losses occur in Solution of pipe flow.
- 19 If the ratio of the velocity of outward stroke and velocity of return stroke is 8, then the ratio of outward angle to return angle is 361 O a. 2 O b. 0.125 Oc. 8 Od. 4 20 Find the correct statement with respect to balancing of masses: Oa. Unbalanced force due to reciprocating masses varies in direction but constant in magnitude O b. Unbalanced force due to reciprocating masses varies in magnitude but constant in direction O c. Unbalanced force due to rotating masses is constant in magnitude and direction O d. Unbalanced force due to rotating masses is constant in direction but varies magnitudeQ- The unit of energy in S.I. unit. Select one: Joule/sec Joule Watt O kg Joule/m3. The force of a linear spring is given by F = kx, where F and k are the force on the spring and its stiffness, respectively. What is the dimension of k in the MLT system of units? a. M/L ML/T² b. F/L M/T² 4. A vehicle is running at 80 kph in a highway. If its wheel has a diameter of 524 mm, how fast is it turning in rpm. Assume that there is no slippage between the ground and the wheel. C. 742 d. 810 a. b. C. d. 565 675
- Q1: A car initial velocity is 12 m/s moves with accn 3 a m/s . Find the its velocity after it moves a distance of 120 m { laws you may use are 2 V- v, = at , v,- v,¯ = 2as , s = v, t + 0.5 at } Choose the correct answer Select one: a. 29.4 m/s b. 29.4 mm c. 23 m/s d. 21.9 m/s b R VE 20 m/s A car is moving on a concave road as shown Find the reaction between the car and road if mass of car = 900 kg and R = 50 m ( assume g = 10 m/s)( a_ = v/r) Select one: a. 18000 kg b. 1800 kg c. 18000 N d. 16200 NQ1: Mass flow through a sonic nozzle is a function of gas pressure and temperature (Pressure = P, Temperature = T). If the mass flow rate through the nozzle is given by: m = 0.0430 70.5 Where: m Ib/min, P = Psia, T = °R a) Determine what the units for the constant 0.0430 are? b) What will be the new value of the constant, now gives as 0.0430, if the variables in the equation are to be substituted with SI units and m is calculated in SI units? Q2: Some of fermentation organism which is used to analyze the waste water from oil refinery can live at reduced air pressure down to 22 Kpa. In a test a mercury manometer attached to a tank reads 64.5 cmHg and the barometer reads 104 Kpa. Will the organize live at this conditions?On the water heater it says 200 W, 220 V. a. What is the meaning of the writing b. How much electric current flows in the water heater c. If the water heater is used to mengenasi 1 liter of water so experience d. How long does it take for a temperature increase of 50oC (c water = 4200 J / kgoC, density of water = 1 gr / cm3 )
- 3. 66 lb A. 34° 3.9ft 2.5 ft 4 y Drawing not to scale. 1.1 ft 4.4ft 30 lb IMAGES NOTES DISCUSS UNITS STATS HELP Part Description Anaven Determine the net torque of the two forces about the origin. CCW is 154.12 ft-lb positive. Format Check (include units with answer)1 A gasoline engine working on four stroke develops a brake power of 20.9 kW. A Morse Test was conducted on this engine and the brake power (kW) obtained when each cylinder was made inoperative by short cir- cuiting the spark plug are 14.9, 14.3, 14.8 and 14.5 respectively. The test was conducted at constant speed. Find the indicated power, me- chanical efficiency and bmep when all the cylinders are firing. The bore of the engine is 75 mm and the stroke is 90 mm. The engine is running at 3000 rpm.Q1.B/ what are differences between speed and velocity?