subject
Physics, 14.12.2019 02:31 jabper5522

Let’s think of your cell phone as a rectangular solid of uniform density, with dimensions15 cm by 7 cm by 1 cm. imagine what would happen if you flipped it in the air (wedonotrecommend doing this with a real cell phone.)

(a) describe which axis of the phone has thegreatestmoment of inertia. call thisaxis ˆe3in the body frame of the phone.
(b) you spin the phone exactly around the axis in (a) with angular velocityω3= 20sec−1. what is the resulting motion of the phone (no torques are acting on thephone)?
(c) suppose you are not able to spin the phone exactly around the axis ˆe3, but youalso give it some angular velocityω1ω3around one of the other principal axes. show that the motion is stable, that is, thatω1andω2make small oscillations. what is the frequency of these oscillations, in sec−1? it is these little oscillationsthat make the phone wobble as it rotates through the air.

ansver
Answers: 3

Other questions on the subject: Physics

image
Physics, 21.06.2019 22:20, kl8774
Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)
Answers: 1
image
Physics, 22.06.2019 05:00, bbygrl70
Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?
Answers: 1
image
Physics, 22.06.2019 12:30, promcafee8788
Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j
Answers: 1
image
Physics, 22.06.2019 17:00, davinedmcneal
If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.
Answers: 1
You know the right answer?
Let’s think of your cell phone as a rectangular solid of uniform density, with dimensions15 cm by 7...

Questions in other subjects:

Konu
Mathematics, 27.08.2020 01:01
Konu
Mathematics, 27.08.2020 01:01