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Physics
Physics - AQA
GCSE Physics
Contact Forces
Non-Contact Forces
Weight
Mass
Gravity
Resultant forces
Work done
Calculating forces
Forces and Elasticity
Fluid Pressure
Upthurst and Atomspheric Pressure
Distace-time graphs
Velocity-time graphs
terminal velocity
Newtons first law
Newtons second law
Newtons third law
Inertia law
Investigating Motion
Stopping distances
Reaction times
Momentum
Changes in Momentum
Newtons
________ first law says that a resultant force is needed to make something start moving, speed up or slow down.
Gravity
________ attracts all masses, but you only notice it when one of the masses is really big, like a planet.
Weight
________ is the force acting on an object due to gravity, the pull of gravitational force on the object.
steady speed
To travel at a(n) ________, the driving force needs to balance the frictional forces.
Levers
________ increase the distance from the pivot at which the force is applied.
Free body
________ diagrams show all the forces acting on an object.
collision
Each ________ is an events where the momentum of each ball changes, but the overall momentum stays the same.
upthrust
The ________ is equal to the weight of fluid that has been displaced by the object.
Fluids
________ are substances than can flow because their particles are able to move around.
terminal velocity
However, on Earth, air resistance causes things to fall at different speed, and the ________ of any object is determined by its drag in comparison to its weight.
Vectors
________ are usually represented by an arrow- the length of the arrow shows the magnitude and the direction of the arrow shows the direction of the quantity.
Curves
________ represent acceleration or deceleration.
Distance
________ is Scalar, Displacement is a Vector.
Momentum
________ is mainly about how much ‘ oomph an object has.
Velocity
________ is speed in a given direction.
curve
A(n) ________ means changing acceleration.
Gears
________ are circular discs with ‘ teeth around their edges.
Displacement
________ is a vector quantity.
Flat sections
________ represents travelling at a steady speed.
event
If the momentum before a(n) ________ is zero, then the momentum after is zero.
Mass
________ is just the amount of stuff in an object.
emergency
In a(n) ________, a driver may perform a(n) ________ stop.
Acceleration
________ is definitely not the same as velocity or speed.
reaction time
Where the THINKING DISTANCE is how fast the car travels during the drivers ________.
overall force
A resultant force is the ________ on a point or object.
Gravitational force
________ is the force of attraction between masses.
Distance travelled
________= speed x time.
Atmospheric pressure
________ is created on a surface by air molecules colliding with the surface.
Inertial mass
________ can be found using Newtons Second Law of F= ma.
non zero resultant force
A(n) ________ will always produce acceleration in the direction of the force.
atmosphere
The ________ is a layer of air that surrounds Earth.
Uniform acceleration
________ means a constant acceleration.
Pressure
________ is force per unit area, so this means the particles exert a(n) ________.
smaller distance
Pushing at any other angle means a(n) ________, and so a smaller moment.
Wind speed
________ can be affected by things like temperature, atmospheric pressure and if there are any large buildings or structures nearby.
Terminal velocity
________ depends on shape and area.
curve
A steepening ________ means its speeding up (increasing gradient)
Levers
________ make it easier for us to do work.
Mass
________ is not a force, and is measured in kilograms with a(n) ________ balance.
Gears
________ transmit rotational effects.
non zero resultant force
The velocity will only change if theres a(n) ________ actin on the object.
gravitational force
The sun and the earth are attracted to each other by the ________.
Acceleration
________ is the change in velocity in a certain amount of time.
Some physical quantities only have magnitude and no direction, these are called scalar quantities
speed, distance, mass, temperature, time, etc
You can find out how much work has been done using
W=Fs
This acceleration can take five different forms
starting, stopping, speeding up, slowing down and changing direction
As long as a spring is not stretched past its limit of proportionality, the work done in stretching a spring can be found using
Ee=1/2ke2
Typical car barking distances are
14m at 30mph, 55mm at 60mph and 75m at 70mph
Before
The red ball is stationary, so it has zero momentum
After
The white ball hits the red ball, causing it to move
This is why cars are designed to slow people down over a longer time when they have a crash
the longer it takes for a change in momentum, the smaller the rate if change in momentum, and so the smaller the force
Note 
Flashcard (53)