A student sitting on a chair on a circular platform of, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask Physics Expert

Academics

Home >> Physics

A student sitting on a chair on a circular platform of negligible mass rotates freely on an air table at initial rotational speed 1.7 rad/s . The student's arms are initially extended with 6.0-kg dumbbells in each hand. As the student pulls her arms in toward her body, the dumbbells move from a distance of 0.80 m to 0.10 m from the axis of rotation. The initial rotational inertia of the student's body (not including the dumbbells) with arms extended is 6.0 kg.m2 and her final rotational inertia is 5.0 kg.m2 .

A) Determine the student's final rotational speed.

B) Determine the change of kinetic energy of the system consisting of the student together with the two dumbbells.

C) Determine the change in the kinetic energy of the system consisting of the two dumbbells alone without the student.

D) Determine the change of kinetic energy of the system consisting of student alone without the dumbbells.

View complete question

Physics, Academics

Category:- Physics
Reference No.:- M91705446

Have any Question?Write your Review or question?

Related Questions in Physics

In chemical changes new substances are formed do the atoms

In chemical changes, new substances are formed. Do the atoms involved actually change? If not, what has changed? How would you help your students visualize this?

Question a point charge q1 240 icircfrac14c is held

Question: A point charge q1 = +2.40 Î¼C is held stationary at the origin. A second point charge q2 = -4.30 Î¼C moves from point a (x = 0.150 m, y =0) to point b (x = 0.250 m, y = 0.250 m). What is the electric potential ...

Question part a what is the reaction energy q of this

Question: PART A: What is the reaction energy Q of this reaction? Use c2 = 931.5 MeV/u. PART B: Using fission, what mass m of uranium-235 would be necessary to supply all of the energy that the United States uses in a ye ...

Question situation two electrons each with mass m and

Question: Situation: two electrons, each with mass m and charge q, are released from positions very far from each other. With respect to a certain reference frame, electron A has initial nonzero speed v toward electron B ...

A 0900 kg hammer is moving horizontally at 950 ms when it

A 0.900 kg hammer is moving horizontally at 9.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. Calculate the duration of the impact. (s) What was the average force exerted on the nai ...

Question part a at what angle icirccedil1 to the normal

Question: Part A: At what angle Î¸1 to the normal would the first dark ring be observed? Part B: Suppose that the light from the pinhole projects onto a screen 3 meters away. What is the radius of the first dark ring on ...

A 78 g basketball is launched at an angle of 448 and a

A 78 g basketball is launched at an angle of 44.8? and a distance of 15.9 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal's height. A basketball player tries to make ...

Question a sump pump is draining a flooded basement at the

Question: A sump pump is draining a flooded basement at the rate of 0.650 L/s, with an output pressure of 2.00 ? 10 5 N/m 2 . Neglect frictional losses in both parts of this problem. (a) The water enters a hose with a 3 ...

Question a rifle with a barrel length of 57 cm fires a 11 g

Question: A rifle with a barrel length of 57 cm fires a 11 g bullet with a horizontal speed of 370 m/s . The bullet strikes a block of wood and penetrates to a depth of 12 cm . 1- What resistive force (assumed to be cons ...

Question a slingshot will shoot a 10-g pebble 220 m

Question: A slingshot will shoot a 10-g pebble 22.0 m straight up. Part A: How much potential energy is stored in the slingshot's rubber band? Express your answer using two significant figures. Part B: With the same pote ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As