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- Determine the angular velocity, in rpm, of the rotating drum which results in loss of contact between the clothes and the drum at 0.6985 rad. Assume that the small vanes prevent slipping until loss of contact. Round your answer to 2 decimal places.The shaft as shown in Figure 2 below, having an angular velocity of 100 rev/min, is to be balanced by adding masses in the two correction planes, L and R. The three masses are m1= 6 g, m2 = 7 g, and m3 = 5 g. The dimensions are a= 25 mm, b = 300 mm, c = 600 mm, d =150 mm, e = 75 mm, R1 =125 mm, R2 =150 mm, and R3 = 100 mm. Calculate the magnitudes and orientations of the correction masses at a radius of 130mm.Assuming there is no slippage for the belt assembly below, Determine the following: What is the average angular velocity of each pulley if the rope accelerates from 5 m/s to 10 m/s in 10 s? How many revolutions does the pulley turn in that time? R1 = 0.3 m R2 = 0.2 m R3 = 0.1 m
- Link BC (of length 0.47 m) is pin connected at the fixed point C and makes an angleof ⍬ = 51° with the vertical. This link is connected to the vertical link AB (of length0.3 m) and point A is also the axle of a wheel of negligible size that is moving alonga circular track of radius r =2.3 m. If the speed of A is constant and VA = (-2.59)im/s, which one of the following statements is correct? (In the followingstatements, wAB and wBC denote ⍵AB and ⍵BC respectively, where both are definedpositive in the k-direction and given in rad/s, and A denotes the magnitude of pointA's acceleration in m/s2) 1) wAB=0; wBC=0; aA=02) wAB=6,99; wBC=-7.09; aA=03) wAB=8.63; wBC=0; aA=04) wAB=8.63; wBC=0; aA >0 5) wAB=6.99; wBC=-7.09, aA>0Two spur wheels with involute teeth gear together externally. The pitch circle diameters are 120 mm and 300 mm and the smaller wheel has 19 teeth. The pressure angle is 20o and the addendum is 0,3 of the circular pitch. Determine 1.1 The length of the arc of approach if the smaller wheel is the driver, and 1.2 The maximum velocity of sliding between the teeth when the driver rotates at 200 r/minA drum of mass Ma and radius a rotates freely withinitial angular velocity ωa0. A second drum with mass Mb and radiusb > a is mounted on the same axis and is at rest, although it is free torotate. A thin layer of sand with mass Ms is distributed on the innersurface of the smaller drum. At t = 0, small holes in the inner drumare opened. The sand starts to fly out at a constant rate λ = dm/dtand sticks to the outer drum. (a) Explain, in detail, why the angularvelocity of the inner drum will remain constant. (b) Determine theangular velocity of the outer drum ωb(t). Ignore the transit time ofthe sand
- a rotating shaft carries four unbalanced masses 18 kg, 14 kg, 16 kg and 12 kg at radii 50 mm, 60 mm, 70 mm and 60 mm respectively. the 2nd, 3rd and 4th masses revolve in planes 80 mm, 160 mm and 280 mm respectively measured from the plane of the first mass and are angularly located at 60°, 135° and 270° respectively measured clockwise from the first mass looking from this mass end of the shaft. the shaft is dynamically balanced by two masses, both located at 50 mm radii and revolving in planes mid-way between those of 1st and 2nd masses and midway between those of 3rd and 4th masses. determine, graphically or otherwise, the magnitudes of the masses and their respective angular positions.find the angle of braking for a circular track of radius 600m as to be suitable for driving a car with a maximum speed of 180 km/hr (g=9.8m/sIf the man pulls the strap with constant acceleration during a short time interval Δt, calculate the force (in Newtons) that he must exert in spinning up the disc. These are the numbers. Strap's final speed = v = 1.5 m/s. The disc's radius is R = 0.4 m The small disc's radius is 2 cm The disc's mass is M = 2.4 kg The short time interval is Δt = 0.3 s The disc initially is non-rotating.
- An electric motor has a rotor with a mass moment of inertia of 22 ft-lb-s2. What torque is required to accelerate it from rest to 1,174 rpm in 3.6 seconds? Provide your answer in lb-ft and round to the nearest whole number. An electric motor has a rotor with a mass moment of inertia of 22 ft-lb-s2. What torque is required to accelerate it from rest to 1,174 rpm in 3.6 seconds? Provide your answer in lb-ft and round to the nearest whole number.Wheel, which radius is r=0,4m is rolling without slip with velocity v=3m/s on the plate which is moving with velocity v2=2m/s with respect to the surface. Find the acceleration of the instantaneous center of velocity and the velocity of the instantaneous center of acceleration of the wheelA rotating shaft carries four unbalanced masses 20 kg, 16 kg, 18 kg and 14 kg at radii 55 mm, 65 mm, 75 mm and 65 mm respectively. The 2nd, 3rd and 4th masses revolve in planes 80 mm, 160 mm and 280 mm respectively measured from the plane of the first mass and are angularly located at 65°, 135° and 270° respectively measured clockwise from the first mass.The shaft is dynamically balanced by two masses, both located at 55 mm radii and revolving in planes mid-way between those of 1st and 2nd masses and midway between those of 3rd and 4th masses. Determine, balancing mass by drawing couple polygon and their respective angular position graphically.