Architectural Drafting and Design (MindTap Course List)
7th Edition
ISBN: 9781285165738
Author: Alan Jefferis, David A. Madsen, David P. Madsen
Publisher: Cengage Learning
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Chapter 11, Problem 11.22Q
To determine
The difference between the Georgian and Federal styles.
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2.21 A small truck is to be driven down a 4% grade
at 70 mi/h. The coefficient of road adhesion is 0.95,
and it is known that the braking efficiency is 80%
when the truck is empty and decreases by one
percentage point for every 100 lb of cargo added.
Ignoring aerodynamic resistance, if the driver wants
the truck to be able to achieve a minimum
theoretical stopping distance of 275 ft from the
point of brake application, what is the maximum
amount of cargo (in pounds) that can be carried?
An observer standing beside a one-lane road counted in 5 minutes 20 cars traveling at 30 mph, 30 cars
traveling at 50 mph and 10 cars traveling at 60 mph.
(a) What is the space and time-mean speeds of the observed cars?
(b) What is the average headway of the cars? [
2.20 A driver is traveling at 90 mi/h down a 3%
grade on good, wet pavement. An accident
investigation team noted that braking skid marks
started 410 ft before a parked car was hit at an
estimated 45 mi/h. Ignoring air resistance, and using
theoretical stopping distance, what was the braking
efficiency of the car?
Chapter 11 Solutions
Architectural Drafting and Design (MindTap Course List)
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- 2.32 A driver is traveling at 52 mi/h on a wet road. An object is spotted on the road 415 ft ahead and the driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction time and practical stopping distance, determine the grade of the road.arrow_forwardThe pumping system shown below is supposed to provide at least 250 GPM of water to the drinking trough. The outlet of the drawn tubing at the drinking water trough discharges to the atmosphere as a water jet. The outlet of the pipe is approximately 12 ft higher than the water surface of reservoir. Expected water temperature is 70ᵒF. Your objective is to select a pump and check its performance for the specified system. Your tasks include: 1. Determine total dynamic head (TDH) operating against the pump for the design flow rate. Neglect minor losses. Note that H-W is not appropriate for this water temperature, and you need to use D-W. 2. Use the TDH and Qdesign to approach a pump vendor. She provides you the attached four pump performance curves for your consideration. 3. Select the appropriate pump based on the fit of the selection point on the pump performance curves. 4. Develop the system curve. 5. Determine the pump operating point and record the system operating conditions…arrow_forward$$ 5.1 Assume that you are observing traffic in a single lane of a highway at a specific location. You measure the average headway and average spacing of passing vehicles as 3.2 seconds and 165 ft, respectively. Calculate the flow, average speed, and density of the traffic stream in this lane. 5.2 Assume that you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 30 mi/h, all vehicles in lane 2 are traveling at 45 mi/h, and all vehicles in lane 3 are traveling at 60 mi/h. There is also a constant spacing of 0.5 mile between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time-mean speed and space-mean speed for this traffic stream?arrow_forward
- Determine the direction of F2 such that the resultant force of adding F1 and F2 acts along the positive yaxis.arrow_forward3 decimal places answer don't use aiarrow_forward4.5 in 2.5 in. D B1 0 140 lb 5 in. 40° 20 lb Replace the forces acting at A and D with an equivalent force-couple system acting at point B. Force B = acting at a angle measured from the Submit part Couple M= in the direction. answered Submit partarrow_forward
- 4.5 in. 2.5 in. 140 lb B Only handwritten 5 in. 40° 120 lb Replace the forces acting at A and D with an equivalent force-couple system acting at point B. Force B = acting at a angle measured from the Submit part Couple M= in the direction. Unansweredarrow_forward1.) Calculate the internal forces and moments (shear force, bending moment, and axial force if applicable) at point C on the beam shown below. Clearly show all your steps, including the calculation of support reactions, and the determination of internal loadings at point C. (Ans: Nc = 0 kN, Vc = -6.53 kN, Mc = 71.68 kN.m) 40 pts. 7.5 kN A H 6.0 kN/m 4.0 kN 4.0 C B 2.0 3.0 7.0 1.5 2.0arrow_forwardPlease solve using cartesian coordinates. Be clear about why cos or sin is used (explain the trig). Make sure to account for the normal force.arrow_forward
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