In downhill speed sking a skier is retarded by both the air drag force on the body
Question:
In downhill speed sking a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. (a) Suppose the slope angle is θ = 40.0o, the snow is dry snow with a coefficient of kinetic friction µk = 0.0400, the mass of the skier and equipment is m = 85.0 kg, the cross-sectional area of the (tucked) skier is, 4 = 1.30 m2, the drag coefficient is C = 0.150, and the at density is 1.20 kg/m3.
(a) What is the terminal speed?
(b) If a skier can vary C by a slight amount dC by adjusting, say, the hand positions, what is the corresponding variation in the terminal speed?
Step by Step Answer:
This problem involves Newtons second law for motion along the slope a The force ...View the full answer
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
Related Video
In Physics, a force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. In this video, the concept of force and torque is demonstrated with the practical application of changing the flat tire of the car.
Students also viewed these Mechanics questions
-
The air drag force on a car is 0.225 A V2. Assume air at 290 K, 100 kPa and a car frontal area of 4 m2 driving at 90 km/h. How much energy is used to overcome the air drag driving for 30 minutes?
-
The air drag force on a car is 0.225 A V2. Assume air at 290 K, 100 kPa and a car frontal area of 4 m2 driving at 90 km/h. How much energy is used to overcome the air drag driving for 30 minutes?
-
A piston/cylinder with cross sectional area of 0.01 m2 has a piston mass of 100 kg resting on the stops. With an outside atmospheric pressure of 100 kPa, what should the water pressure be to lift the...
-
just finished the business plan of his start-up company. According to the projections he carried-out, the initial investment is 1,500,000 SAR (assume that we are in the beginning of 2023), which will...
-
All six decision models from Chapter 9 rely on the appropriate timing and amount of cash flow. What are the potential errors a manager can make if this information is not accurate?
-
Describe why building relationships with customers and partners is important. How is this accomplished?
-
Match the terms on the left with the definitions on the right: 1. Accounting 2. Profitability 3. Liquidity 4. Financing activities 5. Investing activities 6. Operating activities 7. Financial...
-
Blue Glove Company uses the columnar cash journals illustrated in the textbook. In April, the following selected cash transactions occurred. 1. Made a refund to a customer as an allowance for damaged...
-
ork 4.1-4.3 Question 25, 4.3.34-Setup & Solve HW Score: 94.59%, 35 of 3 Part 2 of 2 Points: 0 of 1 Find the intervals on which f is increasing and the intervals on which it is decreasing. f(x)= - 4...
-
Allie has bought a new apple orchard. The orchard has a single file of trees, numbered from 1 to N. Each tree has a certail number of ripe apples. Allie has a rule she wants to follow. She wants to...
-
Calculate the ratio of the drag force on a jet flying at 1000 km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is...
-
Continuation of Problem 2, now assume that Eq. 6-14 gives the magnitude of the air drag force on the typical 20 kg stone, which presents to the wind a vertical cross-sectional area of 0.040 m 2 and...
-
The fi eld of nanotechnology is an emerging area for chemical and biological engineers. Consider nickel nanoparticles for use as a catalyst to grow carbon nanotubes. The normal melting temperature,...
-
Please answer these question from Peter Alfandary's TED talk. 1. How does Peter Alfandary's TED talk relate to the material on communication across cultures? 2. Why are there miscommunications...
-
with the following costs and relevant information that are assumed for year 20XY. Help me prepare a budgeted income statement, assuming 600 units to be produced and sold, a per unit selling price of...
-
The following transactions have been extracted from the books of Emmy's Ltd. For the month of January 2021. Record the transactions in the respective accounts, balance-off the accounts and extract a...
-
2. What are some of the assets and limitations of traditional process families? 10. What is the role of bases and supports? 12. What are some limitations of the additive processes? 13. What is the...
-
you will evaluate your ability to apply and critically analyse visualisation techniques using the R language with the ggplot2 library. Description For this assessment, you will demonstrate and...
-
Riley has a daily calorie intake of 2,200 calories and wants to take in \(20 \%\) of their calories as protein. How many calories of protein should be in their daily diet?
-
If (x) 0 on the interval [a, b], the definite integral gives the exact area under the curve between x = a and x = b.
-
By taking the slope of the curve in Figure 2.61, verify that the acceleration is 3.2 m/s 2 at t = 10 s. Velocity (m/s) 300- 250- 200+ 150+ 100+ 50- 0 0 10 20 Velocity vs. Time 30 40 50 Time (s) 60 70...
-
In Fig. 8-46, a spring with k = 170 N/m is at the top of a frictionless incline of angle ( = 37.0(. The lower end of the incline is distance D = 1.00 m from the end of the spring, which is at its...
-
In Fig. 8-42, a block of mass m = 3.20 kg slides from rest a distance d down a frictionless incline at angle ( = 30.0( where it runs into a spring of spring constant 431 N/m. When the block...
-
An unmanned space probe (of mass m and speed v relative to the Sun) approaches the planet Jupiter (of mass M and speed VJ relative to the Sun) as shown in Fig. 9-84. The spacecraft rounds the planet...
-
Continental Railroad Company is evaluating three capital investment proposals by using the net present value method. Relevant data related to the proposals ar summarized as follows: \ table [ [ , \...
-
Question 2 Conrad Brown is 4 0 years old. He is a livestock farmer in the Free State. During the 2 0 2 3 year of assessment, he [ 4 0 Marks ] established a cherry tree orchard on his farm. His...
-
Drake Corporation is reviewing an investment proposal. The initial cost is $ 1 0 5 , 0 0 0 . Estimates of the book value of the investment at the end of each year, the net cash flows for each year,...
Study smarter with the SolutionInn App