Homework Answers
Add Answer to:
(10 points) Problem Statement: The drag coefficient for a newly deaigned hybnid car is predicted to...
A 2790 lb car has a frontal cross-sectional area A of 21.1 ft2, a drag coefficient...
A 2790 lb car has a frontal cross-sectional area A of 21.1 ft2, a drag coefficient Cd of 0.25, and a drive (or tractive) force of 280 lbs. Assume an air density of 2.3x10-3 slug/ft?, Here is a list of frontal areas and drag coefficients for cars. This web site has interesting information on how the physics we are learning is incorporated into video games with cars. NOTES IMAGES DISCUSS UNITS STATS HELP Part Description Answer chk History 11.11 pts....
(25pts) A car has a drag coefficient of CD=0.3 The area of the car is 24ft2....
(25pts) A car has a drag coefficient of CD=0.3 The area of the car is 24ft2. The weight of the car is 3000lbf. The car is travelling at V=75mph through air at sea level (ρ=0.0024 slug/ft3). Treat the rolling friction as μ=0.015. Model the power needed to move the car per the lecture as: . Watch your units. What is the power needed to travel at 75mph, in units of horsepower (hp)? How long does it take to travel one...
Hint: Use 1D relative velocity to find the velocity of the car with respect to the...
Hint: Use 1D relative velocity to find the velocity of the car
with respect to the air, which is used to find the drag force.
A 2520 lb car has a frontal cross-sectional area A of 20.0 ft2, a drag coefficient Cd of 0.25, and a drive (or tractive) force of 250 lbs. Assume an air density of 2.3x10-3 slug/ft3, Here is a list of frontal areas and drag coefficients for cars. This web site has interesting information on how...
(10 points) Problem Statement: A river barge, whose cross section is approximately rectangular, carries a load...
(10 points) Problem Statement: A river barge, whose cross section is approximately rectangular, carries a load of spent coal. The barge is 22ft wide and 95ft long. When unloaded, its draft (depth of submergence) is 4ft and with the load of coal the draft is 10ft Determine: the unloaded weight of the barge the weight of the spent coal Answer tolerance = 2%. Be sure to include units. Your answers: wunloaded wcoa
3.5 2.5 1.5 0.5 8 10 Model velocity, ft/s Problem Statement: A sphere moving in a...
3.5 2.5 1.5 0.5 8 10 Model velocity, ft/s Problem Statement: A sphere moving in a fluid experiences a drag force that is known to be a function of the sphere diameter, velocity, density, and viscosity. You performed some lab tests on a 3 inch diameter sphere using a water tunnel. The figure below indicates the results of your model test. For the tests the viscosity of the water was 2.34 10sifi2 and the water density was 1.94slugslfi3. Based on...
Problem 1 (50): A 3100 lb car has a 5-speed manual transmission with in = 3.22,...
Problem 1 (50): A 3100 lb car has a 5-speed manual transmission with in = 3.22, 1,2 = 2.15, 1,4 = 1.05, 1,5 = 0.68. The final drive ratio 3.08. The air drag coefficient is 0.29 and the front projected area is 22 square feet. The rolling resistance coefficient is 0.02 and the tire radius is 11 inches. The mass factor is 1.0. The drive train efficiency is 0.93. The engine wide-open-throttle output is shown in the figure. a) Determine...
Problem 1 (50): A 3100 lb car has a 5-speed manual transmission with i;= 3.22, 12...
Problem 1 (50): A 3100 lb car has a 5-speed manual transmission with i;= 3.22, 12 = 2.15, 14 = 1.05, 1,5 = 0.68. The final drive ratio 3.08. The air drag coefficient is 0.29 and the front projected area is 22 square feet. The rolling resistance coefficient is 0.02 and the tire radius is 11 inches. The mass factor is 1.0. The drive train efficiency is 0.93. The engine wide-open-throttle output is shown in the figure, a) Determine the...
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2....
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2. The coefficient of rolling resistance of its tires is 0.01. Recall the density of air at sea level is 1.3 kg/m3. How much kinetic energy is required to overcome rolling resistance and air resistance (drag) at Autobahn speeds of 180 km/hr for a 200 km trip? How much useful energy (in MJ) and money (in...
(2 points) Problem Statement: Find the saturation temperature (Tsat ) in degrees Centigrade (degC) for R-134a...
(2 points) Problem Statement: Find the saturation temperature (Tsat ) in degrees Centigrade (degC) for R-134a at 1705 kPa using Property Tables (employ interpolation if necessary). Answer tolerance = 0.5%. Be sure to include units. Your answers: T. sat
(10 points) Problem Statement: A rectangular bar of width w 10 mm, thickness t 4.5 mm, and length...
Experts only please
(10 points) Problem Statement: A rectangular bar of width w 10 mm, thickness t 4.5 mm, and length L-100 mm, is pinned at both ends as shown in the figure. Use theoretical values of C. Yield strength Sy-280 MPa. Modulus E-207 GPa. In-plane means deformation in the x-y plane. Out-of-plane means deformation in the x-z plane. Calculate: the load required to yield the bar Py the in-plane critical load Per the out-of-plane critical load Pcr the slenderness...
A 2790 lb car has a frontal cross-sectional area A of 21.1 ft2, a drag coefficient Cd of 0.25, and a drive (or tractive) force of 280 lbs. Assume an air density of 2.3x10-3 slug/ft?, Here is a list of frontal areas and drag coefficients for cars. This web site has interesting information on how the physics we are learning is incorporated into video games with cars. NOTES IMAGES DISCUSS UNITS STATS HELP Part Description Answer chk History 11.11 pts....
Hint: Use 1D relative velocity to find the velocity of the car
with respect to the air, which is used to find the drag force.
A 2520 lb car has a frontal cross-sectional area A of 20.0 ft2, a drag coefficient Cd of 0.25, and a drive (or tractive) force of 250 lbs. Assume an air density of 2.3x10-3 slug/ft3, Here is a list of frontal areas and drag coefficients for cars. This web site has interesting information on how...
(10 points) Problem Statement: A river barge, whose cross section is approximately rectangular, carries a load of spent coal. The barge is 22ft wide and 95ft long. When unloaded, its draft (depth of submergence) is 4ft and with the load of coal the draft is 10ft Determine: the unloaded weight of the barge the weight of the spent coal Answer tolerance = 2%. Be sure to include units. Your answers: wunloaded wcoa
3.5 2.5 1.5 0.5 8 10 Model velocity, ft/s Problem Statement: A sphere moving in a fluid experiences a drag force that is known to be a function of the sphere diameter, velocity, density, and viscosity. You performed some lab tests on a 3 inch diameter sphere using a water tunnel. The figure below indicates the results of your model test. For the tests the viscosity of the water was 2.34 10sifi2 and the water density was 1.94slugslfi3. Based on...
Problem 1 (50): A 3100 lb car has a 5-speed manual transmission with in = 3.22, 1,2 = 2.15, 1,4 = 1.05, 1,5 = 0.68. The final drive ratio 3.08. The air drag coefficient is 0.29 and the front projected area is 22 square feet. The rolling resistance coefficient is 0.02 and the tire radius is 11 inches. The mass factor is 1.0. The drive train efficiency is 0.93. The engine wide-open-throttle output is shown in the figure. a) Determine...
Problem 1 (50): A 3100 lb car has a 5-speed manual transmission with i;= 3.22, 12 = 2.15, 14 = 1.05, 1,5 = 0.68. The final drive ratio 3.08. The air drag coefficient is 0.29 and the front projected area is 22 square feet. The rolling resistance coefficient is 0.02 and the tire radius is 11 inches. The mass factor is 1.0. The drive train efficiency is 0.93. The engine wide-open-throttle output is shown in the figure, a) Determine the...
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2. The coefficient of rolling resistance of its tires is 0.01. Recall the density of air at sea level is 1.3 kg/m3. How much kinetic energy is required to overcome rolling resistance and air resistance (drag) at Autobahn speeds of 180 km/hr for a 200 km trip? How much useful energy (in MJ) and money (in...
(2 points) Problem Statement: Find the saturation temperature (Tsat ) in degrees Centigrade (degC) for R-134a at 1705 kPa using Property Tables (employ interpolation if necessary). Answer tolerance = 0.5%. Be sure to include units. Your answers: T. sat
Experts only please
(10 points) Problem Statement: A rectangular bar of width w 10 mm, thickness t 4.5 mm, and length L-100 mm, is pinned at both ends as shown in the figure. Use theoretical values of C. Yield strength Sy-280 MPa. Modulus E-207 GPa. In-plane means deformation in the x-y plane. Out-of-plane means deformation in the x-z plane. Calculate: the load required to yield the bar Py the in-plane critical load Per the out-of-plane critical load Pcr the slenderness...
Most questions answered within 3 hours.
-
The following slope distances and differences in elevations
between the tape ends were recorded for a...
asked 16 seconds ago -
1. Assuming random walk markets and normally distributed
returns, if a one day VaR on an...
asked 9 minutes ago -
(a) With a variable life insurance policy, the rate of return on
the investment (the death...
asked 19 minutes ago -
By applying what you know about Grignard reagents and the
mechanism by which benzoic acid is...
asked 43 minutes ago -
For thermoplastics, explain the effects of increasing of each of
the following properties on a polymer’s...
asked 44 minutes ago -
Make a menu for the user to use in python 3 that can search and
replace...
asked 35 minutes ago -
1) An aqueous solution contains 0.280 M
NaHS and 0.128 M
H2S.
The pH of this...
asked 50 minutes ago -
Situational Leadership
is based on interplay of all of the following except:
The amount of guidance...
asked 50 minutes ago -
Consider the following problem: given n positive integers,
separate them into two groups such that adding...
asked 54 minutes ago -
Briefly discuss the following statements:
2.1 A partner never has the right to claim compensation for...
asked 56 minutes ago -
If a bond has an annual probability of default of 6%, 10% and
12% in years...
asked 1 hour ago -
Let X be normally distributed with mean μ = 10 and standard
deviation σ = 6....
asked 1 hour ago