Physics GCSE - AQA Paper 2
What is a scalar quantity?
A quantity that has only magnitude
What is a vector quantity?
a quantity that has both magnitude and direction
What kind of quantity is Distance
Scalar
What kind of quantity is Displacement
Vector
What kind of quantity is Speed
Scalar
What is Newton's first law?
If The forces acting on an object are balanced, the resultant force acting on an object is
zero. This means that the object is either at rest or moving at a constant speed.
Newton's Second Law
Force = Mass x Acceleration (F=ma)
Newton's Third Law
If object A exerts a force on object B, object B will exert an equal and opposite force to
Object A.
What is Free Fall
,when the only force acting on an object is gravity. This means the object accelerates
toward earth at 9.8m/s²
What is terminal velocity
As an object falls, its acceleration decreases as the air resistance upwards increase,
when the two forces are equal, you are at terminal velocity and cease to accelerate.
What is Inertia
A measure of how difficult it is to change the object's velocity.
What is Friction
the force between two objects that opposes motion slowing the movement down.
What is Drag
Most resistive forces are caused by drag. The most important factor in reducing drag is
keeping the object streamlined
What is Breaking force
The amount of force required to stop an object from moving.
Factors effecting thinking distance
Speed of car - faster slower time
Drugs and alcohol - slower time
Tiredness - slower time
Medication - slower time
What is a typical Thinking time
0.2-0.9s
, Factors effecting braking distance
Speed of car - Faster slower time
Wet or icy roads - Slower time
Bald tires - slower time
Worn out breaks - slower time
Different types of waves
Transverse and longitudinal
How do the waves in transverse waves oscillate
The oscillations are perpendicular to the direction of energy transfer
How do the waves in Longitudinal waves oscillate
The oscillations are parallel to the direction of energy transfer
Types of transverse waves
- P Waves
- Water waves
- Light waves
- All Em waves
Types of Longitudinal waves
- Ultrasound
- S waves
- Sound waves
How do seismic waves provide evidence for the structure of the Earth
- P waves are transverse and can travel through liquids
- S waves are longitudinal and cannot
- during an earthquake P and S waves are sent out from the Earthquake site
- Only P waves make it through the core
What is a scalar quantity?
A quantity that has only magnitude
What is a vector quantity?
a quantity that has both magnitude and direction
What kind of quantity is Distance
Scalar
What kind of quantity is Displacement
Vector
What kind of quantity is Speed
Scalar
What is Newton's first law?
If The forces acting on an object are balanced, the resultant force acting on an object is
zero. This means that the object is either at rest or moving at a constant speed.
Newton's Second Law
Force = Mass x Acceleration (F=ma)
Newton's Third Law
If object A exerts a force on object B, object B will exert an equal and opposite force to
Object A.
What is Free Fall
,when the only force acting on an object is gravity. This means the object accelerates
toward earth at 9.8m/s²
What is terminal velocity
As an object falls, its acceleration decreases as the air resistance upwards increase,
when the two forces are equal, you are at terminal velocity and cease to accelerate.
What is Inertia
A measure of how difficult it is to change the object's velocity.
What is Friction
the force between two objects that opposes motion slowing the movement down.
What is Drag
Most resistive forces are caused by drag. The most important factor in reducing drag is
keeping the object streamlined
What is Breaking force
The amount of force required to stop an object from moving.
Factors effecting thinking distance
Speed of car - faster slower time
Drugs and alcohol - slower time
Tiredness - slower time
Medication - slower time
What is a typical Thinking time
0.2-0.9s
, Factors effecting braking distance
Speed of car - Faster slower time
Wet or icy roads - Slower time
Bald tires - slower time
Worn out breaks - slower time
Different types of waves
Transverse and longitudinal
How do the waves in transverse waves oscillate
The oscillations are perpendicular to the direction of energy transfer
How do the waves in Longitudinal waves oscillate
The oscillations are parallel to the direction of energy transfer
Types of transverse waves
- P Waves
- Water waves
- Light waves
- All Em waves
Types of Longitudinal waves
- Ultrasound
- S waves
- Sound waves
How do seismic waves provide evidence for the structure of the Earth
- P waves are transverse and can travel through liquids
- S waves are longitudinal and cannot
- during an earthquake P and S waves are sent out from the Earthquake site
- Only P waves make it through the core
