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A 10 HP Motor turning 1800 rpm is attached to a 60:1 speed reducing gearbox. The motor has an efficiency of 80%. It operates at 240V AC. A 12" diameter drum is attached to the gearbox output shaft, and a wire rope is wrapped around the drum to act as a winch. The winch is used to raise bucket of raw material in a factory.
A). What is the rotational speed of the drum in rpm?
B). What is the linear speed of the wire/bucket in fps?
C). What is the maximum weight that the winch can lift in lbs?
D). What is the work done in lifting the maximum weight to a height of 50 feet?
E). What is the current draw of the motor during this operation?
A square plate of uniform thickness has a side length of 25 cm that hangs vertically from hinges at its top edge, When horizontal jet strikes the plate at its center, the plate is deflected and comes to rest at an angle of 30o to the vertical.
The guy wires AB and AC are attached to the top of the transmission tower. The tension in cable AB is 8.6 kN. Determine the required tension T in cable AC such that the net effect of the two cables is a downward force at point A.
The distance covered by an aerial photograph is determined by both the focal length of the camera and the tilt of the camera. Although the tilt is usually small, both archaeological and Canadian photographs often use larger tilts.
What is the cost breakdown structure(CBS)? What are its purposes? What is included (or excluded)? How does it relate to a work breakdown structure (WBS)?
Name three types of metamorphic foliations, and draw a small sketch that shows a situation where a metamorphic foliation could cause problems in an excavation.
A car collided with a telephone pole and left 20 ft skid marks on the dry pavement. Based on the damages sustained, an engineer estimated that the speed at collision was 15 mph. If the roadway had a +3% grade, calculate the speed of the car at the..
A Ferris wheel with a radius of 35 feet starts from rest and undergoes an angular acceleration of 0.05 rad/s^2. Compute the magnitude of the velocity and acceleration vectors at 5 seconds for a point on the rim of the Ferris wheel.
The fixture AC is designed with a screw adjustment to regulate the height of the 900 N load supported by the roller at A. The screw bears against a smooth surface at B. Determine the reaction forces at points B and C. Neglect the weight of the fix..
determine the force in member AC, FH, and FG and indicate if the member is in tension or compression. List all zero force members.
A sprinter runs using a force of 200 N and a power output of 600 W. Calculate how many minutes it takes for the runner to run 1 km.
Determine the velocity of slider block C at t=0, (b) the acceleration of A and C, (c) the change in position of block A after 5s.
What is the TCE concentration in ppm if the tank is held at (a) 4 degrees C and (b) 35 degrees C (c) What is the TCE concentration in ppm if the tank is filled with hexane instead of water Consider the temperature dependence of the density of wat..
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