1. The effect of angle
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- [24] Which of the following statement(s) is/are correct? I. The “action” and “reaction” forces are in the same direction. II. The “action” and “reaction” forces act on different bodies. III. The “action” and “reaction” forces are exerted by the same object. IV. The “action” force is sometimes greater than the “reaction” force. I and II only I and III only II only none of the given choices IV onlyβ=θ+γ =60+20 =80Can u explain why the above equation is used in determining the angle of wrap and why does in all 3 pulleys u used same β20. A regenerative braking system stores kinetic energy of a car so that it can be recovered when the vehicle resumes moving. One way to do this is to “store” the energy in a spinning flywheel. One such design uses a solid disk flywheel with moment of inertia 0.040 kg m2 and maximum rotation rate 45000 rpm. (a) What is the maximum energy storage? (b) In principle it could store the kinetic energy of a 1700 kg car moving at what speed before braking? (c) If this energy is used to start the car moving again in 10.0 s, what is the power output of the system?
- The following are five different types of machoines 1. Pulley block 2. Lever 3. Worm and wheel 4. Incline plane 5. Screw Jack Discuss the operation of these machines. The discussion should include velocity ratio, mechanical advantage and efficiencyWhat is magnitude of the normal force A the road exerts on the front wheels in kN? a. 14.0 b. 12.76 c. 7.54 d. 6.05The following are five different types of machines 1. Pulley block 2. Lever 3. Worm and wheel 4. Incline plane 5. Screw Jack Discuss the operation of these machines. The discussion should include velocity ratio, mechanical advantage and efficiency
- A four-stroke, 8-cylinder diesel engine with bore and stroke of 9 inches and 12 inchesrespectively and speed of 950 RPM has a Mean Effective Pressure of 164 psi. Determine the Engine displacement ( ft^3 ) and Engine Horsepower.1.Why have eight cylinders in an engine? why not have one big cylinder of the same displacement of the eight cylinders instead? 27. What causes white smoke in two stroke locomotive engines? 28. Why efficiency of gas turbines is lower compared to internal combustion engines?What do you mean by instantaneous axis of rotation?
- The brake fuel conversion efficiency of an engine is 0.3. The mechanical efficiency is 0.8. The combustion efficiency is 0.94. The heat losses to the coolant and oil are 60 kW. The fuel chemical energy entering the engine per unit time, m/QHV is 190 kW. What percentage of this energy becomes? (a) brake work; (b) friction work; (c) heat losses; (d) exhaust chemical energy; (e) exhaust sensible energy.BC yapı elemanının üzerindeki kuvvet ne olur ?With the same engine displacement, diesel-powered automobiles typically produce greater torque on the tires than their gasoline-powered counterpart. This means that the diesel variant has greater towing capacity than the gasoline variant. A. True B. False