Physics B2 Topic Revision Flashcards
What does the digestive system do
Breaks down food and absorbs nutrients for energy and growth
What is force measured in
N aka newtons
How do you calculate speed example: a skateboard travels 100m in 23 seconds
Speed = distance / Time (well done if you did the question it is 4.35m/s don’t forget the m/s
A skateboard travels 800m in 1.5 min
8.9m/s note speed = distance / time
What is speed
Speed is a measure of how fast or slow something a object is moving
What is a balanced force
A balanced force is equal to both forces
What is a unbalanced force
It is when the N are more in one than the other
What is pressure
Pressure is the amount of force pushing down on an area
What is area
The space inside the shape
If there is a large force but a small area will that be a large or small pressure
Large as with a small area there is less area for the force to spread out
If there is a large force with a large area is it gonna have a large or small pressure
Small as it spreads it out alot
How do you calculate pressure
Pressure = force / area
What is a easy way of remembering independent and dependent variables that mr netcher taught you
Dairy milk ice cream (Dependent measure Independent Change
If you had 300 N and 2800 area what would that be in pressure
0.107N/CM3 (note don’t forget the newton slash centimetre cubed
How to calculate force with pressure and area
P(pressure) X A (Area) Equals the force
How to calculate area with force and pressure
Force divided by Pressure
The deeper the water the _______ pressure
Higher as all the weight and force of the water on top of it
The shallower the water the _________ pressure
Lower as there is less weight and pressure of all the liquid above it
With dams why do they need to be more thicker at the bottom than the top
Because at the top there is more pressure which is constantly pushing at the walls of the dam so they need a thicker wall to keep it secure
What is the shortened way of showing grams per cubic centimetre
g/cm 3 ( note the three is meant to be a smaller one and on the top right corner of the M)
The bigger the mass the bigger what
Density
Smaller the volume the bigger the what
Density
How do you calculate density
Density = mass / volume
How to calculate mass with density and volume
Mass = density X Volume
How to calculate volume with mass and density
Volume = mass divided by density
Calculate the density with 300g and 100cm3
3G/cm3 ( 300 / 100 = 3g
Calculate the density with 95g and 950cm3
0.1g/cm3 (95 / 950 = 0.1g
Calculate mass with density 24g and volume 1200cm3
28800 ( 24 X 1200 = 28800
Calculate volume with 15g/cm3 and 1500g
100 ( 1500 / 15 = 100)
