
A radial saw has a blade with a 12-in. radius. Suppose that the blade spins at...
need help with both
-1.8 rad -103.1 10. -12 POINTS SALGTRIG4 5.1.003. The rotor blades of a helicopter are 14 ft long and are rotating at 180 rpm. (a) Find the angular speed, w, of the rotor. W rad/min (b) Find the linear speed, v, of a point on the tip of a blade. ft/min MYN 11. -11 POINTS SALGTRIG4 5.1.009. Express tan() in terms of sec() for in Quadrant II. tan(0) -
3. (12 pts.) A helicopter blade has an angular speed of o = 260 rev/min and has an angular acceleration of a=6.22 rad/s". For points 1 and 2 on the blade in the figure find the magnitudes of (a) the tangential speeds and (b) the tangential accelerations. 2 3.00 m 6.70 m
1. A 10-in circular saw runs idle at 7200 rev/min. The saw blade is 14 gauge (0.0747 in) steely = 0.282 lbf in and y = 0.292) and is used on a 3/4-in arbor. The thickness of the blade is uniform a. Find the maximum radial stress in the blade *12* *8* b. Find the maximum tangential stress in the blade *5* c. Find maximum shear stress in the blade, use MSS theory
A circular saw blade 0.180 m in diameter starts from rest. In 6.50 s , it reaches an angular velocity of 170 rad/s with constant angular acceleration. Find the angular acceleration and the angle through which the blade has turned in this time.
A radial water pump with an exit radius of 5 in. an exit blade thickness of 0.6 in. develops an actual pressure head of 100 ft at 500 gpm when rotating at 1750 rpm. The shaft power is measured to be 21 hp and the losses are estimated to be 1.4 hp for disk friction, 0.5 hp for bearings/seals, and 20 gpm for leakage. Determine: 3. a) Volumetric Efficiency b) Mechanical Efficiency c) Hydraulic Efficiency d) Exit blade angle
A large 3-bladed fan has a radius of 3.5 m. Each blade has a
mass of 130 kg. Treat each blade as a thin rod. Determine the
angular momentum of the fan in unit vector notation if it spins at
350 rpm. Assume +x is to the right and +y is up.
a circular saw with a diameter of 12 inches spins at 25 revolutions per second. a) what is its linear velocity in feet per minute? b) what is its angular velocity in radians per second?
3. An electrical motor spins at 1000 rpm and is slowing down at a rate of 10 rad/s (a) If the motor radius is 7.165 cm, what is the linear acceleration of the edgc of the motor? (b) How long will it take to decrease it's angular velocity by 75%
A 16 cm -diameter circular saw blade has a mass of 0.95 kg , distributed uniformly as in a disk. What is its rotational kinetic energy at 2900 rpm ? What average power must be applied to bring the blade from rest to 2900 rpm in 3.5 s ?
A 16 cm -diameter circular saw blade has a mass of 0.95 kg , distributed uniformly as in a disk. What is its rotational kinetic energy at 2900 rpm ? What average power must be applied to bring the blade from rest to 2900 rpm in 3.5 s ?