Syringe: Find force given volume and pressure

Click For Summary
SUMMARY

The discussion focuses on calculating the force exerted on a syringe piston given specific volume and pressure readings. A 60 mL syringe initially at 100 kPa is compressed to 30 mL, resulting in a pressure increase to 200 kPa. The key equation used is P = F/A, where P represents pressure, F is force, and A is the cross-sectional area of the syringe. The challenge lies in determining the area, which requires additional information about the syringe's dimensions.

PREREQUISITES
  • Understanding of pressure concepts in physics
  • Familiarity with the equation P = F/A
  • Basic knowledge of volume and area calculations
  • Ability to interpret problem statements in physics
NEXT STEPS
  • Research how to calculate the cross-sectional area of a cylinder
  • Learn about the relationship between pressure, volume, and force in fluid mechanics
  • Explore the ideal gas law and its applications in pressure-volume scenarios
  • Study practical applications of syringes in medical and laboratory settings
USEFUL FOR

Students studying physics, particularly those focusing on fluid mechanics, as well as professionals in fields requiring knowledge of pressure and force dynamics, such as engineering and medical technology.

kamhogo
Messages
86
Reaction score
6
tmp_12521-20160917_2136381121909164.jpg

Homework Statement


A 60 mL syringe filled with air is connected to a pressure sensor. The latter reads 100kPa.
You then push on the piston until it stops moving. You now have 30 mL and the pressure sensor reads 200kPa.

What force is used to keep the syringe rubber at the 30 mL mark?

Homework Equations


P=F/A

The Attempt at a Solution


I'm lost. I need the surface of the rubber ( not given) or at least the length of the syringe ( A= V/L) to find the force. A hint please?
 
Physics news on Phys.org
You've put your finger on the missing/necessary information; reread the problem statement to be certain of that fact.
 
Bystander said:
You've put your finger on the missing/necessary information
:woot:
 

Similar threads

Replies
2
Views
1K
Replies
2
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
1K
Replies
4
Views
5K
  • · Replies 6 ·
Replies
6
Views
16K
  • · Replies 20 ·
Replies
20
Views
5K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 9 ·
Replies
9
Views
9K