Unsolvable Angular Momentum Equation for Two Objects?

athrun200
Messages
275
Reaction score
0

Homework Statement



attachment.php?attachmentid=40966&stc=1&d=1321407746.png


Homework Equations





The Attempt at a Solution


2 eqtns but 6 unknows, unsolvable?
attachment.php?attachmentid=40965&stc=1&d=1321407746.gif
 

Attachments

  • 1.gif
    1.gif
    2.3 KB · Views: 543
  • 擷取.PNG
    擷取.PNG
    9.4 KB · Views: 513
Physics news on Phys.org
no one understand?
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Angular Momentum Problem: Mouse walking on a rotating turntable
Replies
5
Views
1K
Angular momentum for a bullet and a rod attached to a ceiling
Replies
17
Views
1K
Angular Momentum- Conserved or not?
Replies
17
Views
412
Problem in understanding angular momentum of a rigid body
Replies
10
Views
2K
Collision of a bullet on a rod-string system: query
2
Replies
71
Views
2K
Angular momentum of a disk about an axis parallel to center of mass axis
Replies
5
Views
2K
Angular Momentum Problem: Torque after fall
Replies
4
Views
1K
About linear and angular momentum
Replies
12
Views
2K
System of two wheels of different sizes with an axle through their centers
2
Replies
67
Views
4K
Conservation of angular momentum under central forces
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top