Trial Time (s) 1 2.4 2 2.6 3. You just finished your Saturday morning run and...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Trial Time (s) 1 2.4 2 2.6 3. You just finished your Saturday morning run and are sitting on a park bench resting. You see a little girl playing with one of those rotating platforms that several kids could sit on and be spun around by their parents. But, there is no one sitting on the platform and the little girl is spinning it on her own. She runs around in circles, faster and faster until she can't make it go any faster, then she lets go. She stares at it spinning slower and slower until it comes to rest. Then, she does it all over again, and again, and again, a total of 5 times. You 3 2.3 4 2.3 realize that without knowing it the little girl is doing an experiment that you could use to estimate the frictional torque being exerted by the central support on the rotating platform. Since you were out running you had your stopwatch on and you timed the last 4 of the little girl's trials (shown in the table). You estimate that the platform was rotating at 0.20 +0.03 rev/s each time the girl let go of it, and that the rotational inertia of the platform is 14020kg.m. a. Which of the three kinds of experiment is this? How do you know? What major feature of this kind of experiment is missing? b. Estimate the frictional torque being exerted on the platform by first estimating the rotational acceleration of the platform. Include the uncertainty in your estimate of the frictional torque. c. Describe any assumptions that you made in your mathematical procedure. Trial Time (s) 1 2.4 2 2.6 3. You just finished your Saturday morning run and are sitting on a park bench resting. You see a little girl playing with one of those rotating platforms that several kids could sit on and be spun around by their parents. But, there is no one sitting on the platform and the little girl is spinning it on her own. She runs around in circles, faster and faster until she can't make it go any faster, then she lets go. She stares at it spinning slower and slower until it comes to rest. Then, she does it all over again, and again, and again, a total of 5 times. You 3 2.3 4 2.3 realize that without knowing it the little girl is doing an experiment that you could use to estimate the frictional torque being exerted by the central support on the rotating platform. Since you were out running you had your stopwatch on and you timed the last 4 of the little girl's trials (shown in the table). You estimate that the platform was rotating at 0.20 +0.03 rev/s each time the girl let go of it, and that the rotational inertia of the platform is 14020kg.m. a. Which of the three kinds of experiment is this? How do you know? What major feature of this kind of experiment is missing? b. Estimate the frictional torque being exerted on the platform by first estimating the rotational acceleration of the platform. Include the uncertainty in your estimate of the frictional torque. c. Describe any assumptions that you made in your mathematical procedure.
Expert Answer:
Related Book For
Foundations of Financial Management
ISBN: 978-1259024979
10th Canadian edition
Authors: Stanley Block, Geoffrey Hirt, Bartley Danielsen, Doug Short, Michael Perretta
Posted Date:
Students also viewed these physics questions
-
Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...
-
The Crazy Eddie fraud may appear smaller and gentler than the massive billion-dollar frauds exposed in recent times, such as Bernie Madoffs Ponzi scheme, frauds in the subprime mortgage market, the...
-
To Premium From Actuarial Rating Advertising Sales Actuarial Premium 1e% 25% 15 60 The direct operating costs of the departments (including both variable and fixed costs) are Actuarial Premium rating...
-
What nontax factor(s) should an employee consider when deciding whether and to what extent to participate in an employer's 401(k) plan?
-
Before exiting a restaurant, it is customary to leave a tip equal to about 15% of the price of your meal. Although patrons are not legally required to leave a tip, virtually all customers do so. A...
-
What are the three main techniques used to analyze capital budgeting projects? Discuss the advantages and disadvantages of each method.
-
Accountants at the firm Walker and Walker believed that several traveling executives submit unusually high travel vouchers when they return from business trips. The accountants took a sample of 200...
-
Kevin, Kimoko, Maggie, and Ashley have a partnership that calls for the following allocation of income: Kevin and Kimoko are the receive lump sum salary payments of $50,000 each, if there's a profit...
-
Let V be a finite dimensional vector space over R with a positive definite scalar product and let A be symmetric linear operator on V. (a) State the Spectral Theorem for A.
-
Explain the importance of Intercultural Competence in a Diverse world in Angola Explore Cultural Sensitivity: the ability to feel the cultural diversity, identify the needs caused of the cultural...
-
Given the following output. Please write a C++ code that can produce the object below. Hint: Please use FOR LOOP. Enter number of rows: 10
-
What is the value proposition of Cinemark holdings inc?
-
Capital investment decisions are based on accurate analysis of cash flows in a business. Managers can choose from several analytical techniques to analyze cash flows. Some techniques take into...
-
Create a class called Polynomial Evaluator which does the following: Prompts the user for a polynomial of the form: e.g. f(x)=3x^3-5x^2 +1x^4 +9x^6 +3.1x^1 +2 (note the spaces) Prompts the user for...
-
Now assume that ' sales are collected as follows: 60% in the month of the sale (cash sales) 30% in the month after the sale 8% two months after the sale 2% never collected Requirement Prepare a...
-
Assume a simple Keynesian depression economy with a multiplier of 4 and an initial equilibrium income of $3,000. Saving and investment equal $400, and assume full employment income is $4,000. a. What...
-
SUS Appliance toasters sell for $20 per unit, and the variable cost to produce them is $15. SUS estimates that the fixed costs are $80,000. a. Compute the break-even point in units. b. Fill in the...
-
What two conditions must be met to go from Formula 10-7 to Formula 10-8 in using the dividend valuation model?
-
Larry's Athletic Lounge is considering an expansion program to increase the sophistication of the exercise equipment. The equipment will cost $20,000 and has an estimated life of five years. Larry is...
-
Following are several tests of controls introduced in the chapter: Examine periodic reports by non-Purchasing Department personnel regarding purchase prices and practices. Observe Receiving...
-
Harold Brodkey plans to apply sequential sampling to the receiving controls used by the Ozyck Corporation, a December 31, 1999 year end manufacturer and supplier of home lighting fixtures. Based on a...
-
Few departments within a corporation, not-for-profit institution, or governmental entity can have quite as significant an influence on cost containment as Purchasing, since the purchasing function...
Study smarter with the SolutionInn App