ZuoTi.Pro
Question

7.) a person with moment of inertia I is spinning with an angular velocity w, by...

7.) a person with moment of inertia I is spinning with an angular velocity w, by which factor will the kinetic energy of the person change if he moves his arm positions such that his moment of inertia changes to 2I

a. 1/4

b. 1/2

c. 2

d. 4

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

initital rotational kinetic energy of person -K, initital moment of inertia of the person initial angular velocity of the person : final rotational kinetic energy of person -K final moment of inertia of the personI final angular velocity of the person-o, by the conservation of rotational angular mometumm use conservation of energy 2 4 4 the kinetic enrgy changes by the factor of choice is (b

0 0
Add a comment
Know the answer?
Add Answer to:
7.) a person with moment of inertia I is spinning with an angular velocity w, by...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 6.)a person with a moment of inertia I is spinning with an angular velocity w. what...

    6.)a person with a moment of inertia I is spinning with an angular velocity w. what will the angular velocity of the person be if he changes his arm position such that his moment of interia changes to 3/4 I a. 3/4 w b.w c. 4/3 w

  • 1.) For a rotating rigid body which of the following statements is not correct? a.) all...

    1.) For a rotating rigid body which of the following statements is not correct? a.) all points along a rotating rigid body move with constant speed b.) points along a rotating body move through the same angle in equal time intervals c.) point along a rotating body have velocities that continuously change directions d.) all of the above 2.) Which of the following quantities will impact how a rigid body's rotational speed can change? a.) the body's rotational inertia b.)the...

  • A fan with the moment of inertia of 4 kgm2 is spinning with an angular speed...

    A fan with the moment of inertia of 4 kgm2 is spinning with an angular speed of 10 rad/s. What is its rotational kinetic energy in J

  • 1. A pottery wheel with moment of inertia I = 0.14 kg m2 is spinning at...

    1. A pottery wheel with moment of inertia I = 0.14 kg m2 is spinning at 5 radians/sec. How much kinetic energy does it have? 2. Ceres is the largest asteroid in the belt between Mars and Jupiter. It has an average radius of 475 km and a period of rotation of 9.07 hours. Calculate its angular momentum if the mass is 9.42 x 1020 kg The moment of inertia of a solid sphere I = 2/5 mR2

  • A person with mass mp = 76 kg stands on a spinning platform disk with a...

    A person with mass mp = 76 kg stands on a spinning platform disk with a radius of R = 1.89 m and mass md = 191 kg. The disk is initially spinning at ω = 1.6 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.63 m from the center). 1) What is the total moment of inertia of the system about the center of the disk when the person stands on...

  • A person with mass mp = 74 kg stands on a spinning platform disk with a...

    A person with mass mp = 74 kg stands on a spinning platform disk with a radius of R = 2.37 m and mass md = 184 kg. The disk is initially spinning at ? = 1.9 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.79 m from the center).                                            1) What is the total moment of inertia of the system about the center of the disk when the person stands...

  • (a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment...

    (a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.400kg⋅m20.400kg⋅m2  (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia if his angular velocity decreases to 1.25 rev/s. (c) Suppose instead he keeps his arms in and allows friction of the ice to slow him to 3.00 rev/s. What average torque was exerted...

  • A person with mass mp = 79 kg stands on a spinning platform disk with a...

    A person with mass mp = 79 kg stands on a spinning platform disk with a radius of R = 1.86 m and mass md = 183 kg. The disk is initially spinning at ω = 1.8 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.62 m from the center). 1) What is the total moment of inertia of the system about the center of the disk when the person stands on...

  • A person with mass ma = 75 kg stands on a spinning platform disk with a...

    A person with mass ma = 75 kg stands on a spinning platform disk with a radius of R = 1.71 m and mass m-188 kg. The disk is initially spinning at ω = 1 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.57 m from the center). 1)What is the total moment of inertia of the system about the center of the disk when the person stands on the rim of...

  • 4. An ice skater with rotational inertia I = 0.23 kg*m* is spinning with angular speed...

    4. An ice skater with rotational inertia I = 0.23 kg*m* is spinning with angular speed w. They pull their arms in, increasing their angular speed to 4w. What is the final moment of inertia?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT