Flashcards
Physics: Chapter 5: Forces and Matter (pressure)
Cards in this deck (27)
- 1What Pressure?A force spread out over an area
- 2What is the equation for pressure? Word, symbol, unitsPressure = Force/ area
P = F/A
Pa = N/m2
Pressure unit is also N/m2 - 3What is the relationship between Pressure and force?They are directly Proportional
- 4What is the relationship between Pressure and Area?They are inversely proportional.
- 5What is the equation for Pressure in Liquids? Symbol, word, unitPressure = Density * Gravity * Height
P = hpg
Pa = kg/m3 * m/s2 * m - 6What direction does pressure in a liquid act?In all directions
- 7How does the pressure change going deeper into a fluid, Why?The deeper the fluid the greater the pressure because the weight of the water is greater.
- 8What is the pressure on each plunger in Hydraulics?The pressure on one plunger is hte same as the pressure on the other plunger.
PA = PB - 9Show the equation of plunger A and plunger B with force and area.PA = F1/A1 = F2/A2 (PB)
- 10Show the equation of plunger A and B for volume.Volume A = Area A * distance A = Area B * distance B = Volume B
- 11What do Barometers measure and How?Measure atmospheric pressure.
The weight of the atmosphere pushes down on the reservoir of mercury, forcing some up the tube. The height of the mercury column can be used to calculate the pressure using the density of mercury. - 12Give a labeled diagram of a BarometerLabel H for height
- 13Give a diagram of a manometer
- 14What does a manometer measure? How does it do this?A manometer measures the pressure difference in pressure between two gases or liquids.
The difference in height of the two columns allows you to find the pressure. - 15Note on gas pressureMolecules in a gas collide with the wall of the container and rebound. The change in direction after the collision means a change in momentum.
- 16How do you calculate a change in motion?Change in motion = force * time
- 17What happens to the pressure in a closed container if the volume increases?The pressure decreases as it takes longer to collide with the walls and other particles as there is more space. Speed is constant.
Pressure and volume inversely proportional. - 18What happens to the pressure in a closed container when the temperature increases?Pressure increases because the particles have more kinetic energy and therefor move faster and so can collide with the wall sand other particles faster and with more force creating more pressure - directly proportion.
- 19What is Boyle's Law?P1V1 = P2V2
Pressure * volume = constant (the same)
If the temperature is kept the same and the pressure changes, the volume of the gas will also change. If the temperature is kept the same and the volume changes the pressure of the gas also changes. - 20How do you find just P1?P1 = P2V2 / V1
- 21What is Tension?A force you get in an object unter tensile forces.
Eg a rope with an object haning from it - 22How do you calculate the spring constant?Spring Constant = Force (load)/extension
- 23How do you calculate the force (load) symbol, word and unitsforce = Spring Constant * Extension
F=kx
N=N/m * m - 24How do you calculate the extension (from the spring)?length - normal length
- 25What is Hooke's Law?The load applied to a spring is directly proportional to the extension produced under their proportional limit.
- 26What is Limit of proportionality?Point at which load and extension proportional.
- 27What is Elastic limit?Point at which the spring will not return to its original shape after being stretched.
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- GCSE Science (Physics) Flashcards on Physics: Chapter 5: Forces and Matter (pressure), created by HRYN red on 17/03/2020.
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- HRYN red · Mar 2020
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- Aug 4, 2020
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