Describe how a screw and nut move in relatively opposite directions.
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- Q.Derive the tension ratio of the belt drive.A car has hydraulically operated disc brakes at the front and drum brakes at the rear. The frontbrakes have pistons of 58 mm diameter each, whereas each of the wheel cylinder at the rearbrake has 28 mm diameter. The master cylinder piston has diameter of 40 mm. The brake footpedal has a leverage of 4. If the brake pedal is applied a force of 100 N, Calculate (i) The brakingforce on the front axle, (ii) The braking force on the rear axle.ASAP
- For the belt drive shown below calculate the contact angle 0, if: D = 100 mm; d = 30 mm; C = 300 mm.Solve the mobility of the linkage.The weight of the wheel tractor in Problem 1 is 30 tons and the weight on the drivingwheels is 50% of this weight. What is the maximum available rimpull if thecoefficient of traction is 0.25?
- Problem: A pump is driven by an electric motor through an open type flat belt drive. Determine the belt specificationsfor the following data.Motor pulley diameter= 400 mmPump pulley diameter = 800 mmCoefficient of friction for motor pulley = 0.30Coefficient of friction for pump pulley = 0.35Center distance between the pulleys=2000 mmRotational speed of the motor=2000 rpmPower transmission = 40kWdensity of belt material = 1000 kg/m3 width of the belt=240mmthickness of the belt = 5mm8. If the inertia is 80 lb-ft2, and the speed of the driven shaft is to be increased from 0 to 1500 rpm in 3 seconds. Calculate the heat generated for each engagement if clutch starting torque is 10 in-lb.The car shown in the figure below has a mass of 1673 kg. The coefficient of static friction between the rubber tires and the pavement is 0.6. Determine the maximum incline e [degrees] that the car can drive up if it has rear-wheel drive. 0.85 m 1.2 m 1.7 m Answer: 18.87 Calculate the normal reaction force at the rear wheels for the condition of rear-wheel drive in N. Answer:
- A belt conveyor transports 18 tonnes per hr at 20°. Determine the unit weight of belt material in kg/ply-cm width-m to lift the load vertically up sufficient to give 33.5 m horizontal center-to-center pulley distance. 1750-rpm motor, V-belt drive to helical gear speed reducer. Belt speed, 61 m/min. Discharge over tail pulley. No tripper.Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at r=0 to zero at r=R; that is, p=p0(1r2/R2).Problem -03Dry FrictionA band belt is used to control the speed of a flywheel as shown in figure-3.Determine the magnitude of the couple being applied to the flywheel, knowing that the coefficient of kinetic friction between the belt and the flywheel is 0.25 and that the flywheel is rotating clockwise at a constant speed. Show that the same result is obtained if the flywheel rotates counterclockwise.