Compute the kinetic energy of the system

Assignment Help Physics

Reference no: EM13332386

On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.555m from the axis of rotation of the stool. She is given an angular velocity of 3.10rad/s , after which she pulls the dumbbells in until they are only 0.215m distant from the axis. The woman's moment of inertia about the axis of rotation is 4.75kg?m2 and may be considered constant. Each dumbbell has a mass of 4.95kg and may be considered a point mass. Neglect friction.

(A) What is the initial angular momentum of the system?

(B) What is the angular velocity of the system after the dumbbells are pulled in toward the axis?

(D) Compute the kinetic energy of the system after the dumbbells are pulled in.

Reference no: EM13332386

Questions Cloud

Explain the flow of cost in a process costing system : Explain the flow of cost in a process costing system. What do we mean by Equivalent units of production? What do we mean by the term “Contribution Margin?”. Why is it important for a manager to know the location of a break even point?

What is the inductive time constant of the circuit : Consider the circuit in the figure below, taking = 6.00 V, L = 5.20 mH, and R = 4.20 ?. What is the inductive time constant of the circuit

Draw and properly label the cvp graph : Draw and properly label the CVP graph. How can we use CVP analysis to determine if an assigned target profit is reasonable? How can we use CVP analysis to determine if our operations are efficient?

Discuss the flow of cost in a job order system : How do we compute a predetermined overhead rate and why is that important. When would we use a job order costing system? When would we use a process system? Discuss the flow of cost in a job order system.

Compute the kinetic energy of the system : On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.555m from the axis of rotation of the stool. Compute the kinetic energy of the system before the dumbbells are pulled in

Explain the difference between fixed cost and variable cost : In comparing the income statements of merchandising and a manufacturing company, explain how the cost of goods sections are different. Explain the flow of cost in a manufacturing company from raw materials to cost of goods sold. Explain the differenc..

Differences between financial and managerial accounting : Discuss the importance of ethics in business, as we understand it today. Why is a business code of Ethics important to a business? Why is it important to identify and control business risks? Discuss the differences between financial and managerial ac..

Defines the functional or performance specifications : Defines the functional or performance specifications of the project's end product

Compare the properties of pluto with the other planets : Compare the properties of Pluto with the other planets. Based on your comparison, describe why you do or don't believe that Pluto should be a planet. If Pluto is a planet, is it terrestrial or Jovian?

User Account

All Pages