A figure skater (Fig. 9.11) has an initial angular velocity of 3.8 rad/s. She then pulls her
Question:
A figure skater (Fig. 9.11) has an initial angular velocity of 3.8 rad/s. She then pulls her arms in, and her angular velocity increases to 9.5 rad/s. What is the ratio of her final kinetic energy to her initial kinetic energy??
Figure 9.11
?
wi Wf L; = I;w; = Ifwf=L¡ %3D Smaller than I; Larger than w; A B
Step by Step Answer:
The kinetic energy of a skater depends on her moment of inertia and angular speed No sketch neede...View the full answer
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
Related Video
Angular movements are produced when the angle between the bones of joint changes. There are several different types of angular movements, including flexion, extension, hyperextension, abduction, adduction, and circumduction. Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow or moving the wrist to move the hand toward the forearm are examples of flexion. The extension is the opposite of flexion in that the angle between the bones of a joint increase.
Students also viewed these Sciences questions
-
A bicycle wheel has an initial angular velocity of 1.50 rad/ s. (a) If its angular accelera1ion is constant and equal to 0.300 rad/s3, what is its angular velocity at t = 2.50 s? (b) Through what...
-
Estimate the kinetic energy of the spinning top in Figure P9.76. Assume it is made of wood and is rotating with ? = 30 rad/s. You will need to estimate the radius of the top from the figure.? Figure...
-
Identify the following waves as either longitudinal or transverse or both. Use a drawing to illustrate how the motion of the waves medium is related to the direction of propagation of the wave. (a)...
-
Using the case study, characterize Amazons approach to marketing communications.
-
Discuss the computation of cost recovery in the year an asset is placed in service when the mid-quarter convention is being used?
-
If X1, X2, . . . , Xn constitute a random sample from a population with the mean , what condition must be imposed on the constants a1, a2, . . . , an so that a1X1 + a2X2 + + anXn is an unbiased...
-
William White practices medicine under the business title William White, M.D., P.C. During January, the medical practice completed the following transactions: The business uses the following...
-
The compensation committee of a large public corporation engages you to help design a tax efficient compensation plan for the current chief executive officer (CEO). In a preliminary interview with...
-
Jerry W. has just sold her business based in Central New York State to a large retail chain for $25 million, resulting in two lump-sum after-tax payments of $2.5 million each (June 30 and December 31...
-
Automatic control of helicopters is necessary because, unlike fixed-wing aircraft which possess a fair degree of inherent stability, the helicopter is quite unstable. A helicopter control system that...
-
An object is rolling without slipping, with a transnational kinetic energy of KE trans and a rotational kinetic energy of KE rot . If KE trans / KE rot = 3/2, what might this object be, (a) a hoop,...
-
Figure P12.1 shows several snapshots of a wave pulse as it travels along a string. Estimate the speed of the wave pulse. Figure P12.1 ? (m) t = 0 0.2 x (m) 10 40 50 60 70 -0.2 0.2 _t = 1 s x (m) 10...
-
The following terms were introduced in this chapter: 1. Profit and loss ratio 2. Admission by investment 3. Partnership liquidation 4. Mutual agency 5. Salary allowance 6. Withdrawal by payment from...
-
The make-or-buy decision determines what part of the production process needs to outsourced. True or False
-
Supply chain management refers to the process of delivering the supplies necessary for manufacturing. True or False
-
What do consumers expect to happen to inflation over the next two years?
-
Your college professors take on what kind of sales role when they select books for their class? a. Order taker b. Order influencer c. Support personnel d. None of the above
-
What is the funds Treynor ratio?
-
A 5.0 kg rock whose density is 4800 kg/m 3 is suspended by a string such that half of the rocks volume is under water. What is the tension in the string?
-
The rate at which the temperature of an object changes is proportional to the difference between its own temperature and the temperature of the surrounding medium. Express this rate as a function of...
-
You are given the following data for the decomposition of acetaldehyde: Determine the order of the reaction and the rate constant for the reaction. Initial Concentration (M) 9.72 103 4.56x 103...
-
Consider the schematic reaction a. If the reaction is one-half order with respect to [A], what is the integrated rate law expression for this reaction? b. What plot would you construct to determine...
-
A certain reaction is first order, and 540. s after initiation of the reaction, 32.5% of the reactant remains. a. What is the rate constant for this reaction? b. At what time after initiation of the...
-
Why does Marriott Bonvoy have the best loyalty program relative to the cost associated with the program and the program's overall effectiveness? Justify your selection with specific examples.
-
Assignment - Resultant of Simple Distributed Loads 6 kip 1 kip.ft A 2 ft 3 ft 2 ft 2 ft C Q1. Fig.1 shows the plan of a floor slab with a beam A-C. Determine the equivalent resultar force exerted on...
-
A particle of mass m = 10Mev and charge is subjected to a one-dimensional potential 9 2 Mev ey(x) = 1-kx with k = 1 Study 2 fm the correction that energy levels undergo when the particle is subjected...
Study smarter with the SolutionInn App