The lowest pressure on the balloon

  • Thread starter Thread starter Phatossi
  • Start date Start date
  • Tags Tags
    Balloon Pressure
AI Thread Summary
The discussion centers on the relationship between pressure and surface area, specifically regarding balloons dropped on boards with varying numbers of nails. It is established that pressure is defined as force per unit area (p=F/S). The participant initially believes that more nails would increase pressure due to a greater number of points of contact. However, it is clarified that increasing the number of nails actually increases the surface area, which decreases the pressure exerted by the balloons. Ultimately, the understanding is that more nails result in lower pressure on the surface.
Phatossi
Messages
2
Reaction score
0
1. Four balloons with the same size are dropped off from the same height on boards that have different numbers of nails. In which of the cases in the balloon will be the lowest pressure?

2. p=F/S
3. I am not sure about the correct answer, but I am saying my opinion about the right answer. By knowing the pressure as the force which acts onto a surface, I am saying that the board with more nails will have the biggest amount of pressure, because there are more nails in the same surface. Please, correct me if I am wrong.

Thank you for your attention.
 

Attachments

  • 1.jpg
    1.jpg
    6.7 KB · Views: 443
Last edited:
Physics news on Phys.org
Pressure is force per unit area.

Answer this: Which do you think would create greater pressure on the floor: Standing on both feet or standing on one foot?
 
Okay, I got it. I am so amazed by the kind of the explanation that you told me, even that it was indirectly, I really understood it. With two feet, you have a lower pressure, in comparison with the pressure that you have staying with one foot.

So, by increasing the numbers of nails on the boards, we have increased the surface of action, in which case we have decreased the pressure. So, I got it. Thank you indeed for your reply.
 
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 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Clarifying the Definition Total/Stagnation Pressure (p₀) in Bernoulli'
Replies
2
Views
948
What helium mass in a balloon to make it bouyant in air?
Replies
12
Views
1K
Problem on Pressure due to Surface tension
Replies
1
Views
1K
I Big bang balloon?
Replies
5
Views
241
How Does Changing the Temperature Affect a Hot Air Balloon's Buoyancy?
Replies
17
Views
3K
Volume's effect on buoyancy: Does pressure increase?
Replies
11
Views
2K
Bouyancy force -- What mass can the balloon carry?
Replies
9
Views
2K
What is the relationship between tire size and pressure changes?
Replies
13
Views
976
Stone released from a rising balloon
Replies
9
Views
2K
Fill Balloons Homework: Max # People for Bday Party Balloon
Replies
4
Views
5K

Hot Threads

Recent Insights

Back
Top