What is the solution to this waves/statics problem?

  • Thread starter Thread starter Matt1234
  • Start date Start date
  • Tags Tags
    Statics Waves
Matt1234
Messages
141
Reaction score
0

Homework Statement



[PLAIN]http://img5.imageshack.us/img5/7653/73215327.jpg


The answer in the text is sqrt(15)Mg I am not sure how to obtain this from. Please advise.
 
Last edited by a moderator:
Physics news on Phys.org
if this is not clear i can post more.
 
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 »

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 »

Similar threads

Statics Question: Finding resultant force and orientation
Replies
1
Views
8K
What is the required force to push a box upwards on an angled surface?
Replies
3
Views
1K
Can You Calculate Resistance If You Know the Half-Life of a Capacitor?
Replies
1
Views
4K
Newton's Laws Applications - Systems
Replies
3
Views
2K
Textbook 'The Physics of Waves': Linearity of Forced Oscillator
Replies
6
Views
844
How Does Path Difference Affect Interference Patterns in Light Waves?
Replies
4
Views
5K
Time it Takes for a Transverse Pulse to Travel a Distance "L" Up a Cable Against Gravity?
Replies
13
Views
1K
Is the Solution for Rotation of Spherical Mirrors Incorrect?
Replies
16
Views
1K
Proper use of inequality symbols in equations to do with circular motion
Replies
2
Views
1K
What is the mathematical model for a traffic shock wave?
Replies
22
Views
3K

Hot Threads

Recent Insights

Back
Top