Paper 2 speed velocity and energy Flashcards
Scalars
Quantities that are fully described by a magnitude or size (or numerical value) alone
Vectors
Quantities that are full described by both a magnitude and a direction
On a distance time graph what does a diagonal line mean
It means it’s moving at a constant speed
On a distance time graph what does a horizontal line mean
It means the object has stopped
On a distance time graph what does a steeper diagonal line mean
It means the object is going faster but still at a constant speed
On a distance time graph what does a diagonal line downwards mean
It means the object is going back to the start/ reversing still at a constant speed
What is speed
How fast you are travelling and is scalar
What is velocity
Speed in a given direction and is vector
Acceleration (m/s^2) =
Change in velocity (m/s)/ time taken (s)
In a velocity time graph what does an upwards line mean
It means the object is accelerating constantly
In a velocity time graph what does horizontal line mean
It means the car has stopped accelerating and is moving at a constant velocity
In a velocity time graph what does a shallower line mean
It means the object is accelerating less but still constant
In a velocity time graph what does a downwards line mean
It means the object is slowing down/ decelerating
In a velocity time graph what does the area under the graph mean
It shows the distance travelled D=ST
What is gravity
Gravity is a field not a force. The force due to gravity on an object is its weight
What force is acting on a book at rest and what is the equal and opposite force?
Friction is acting on the book and the equal and opposite force is the reaction of the table.
What force is acting on a floating ball and what is the equal and opposite force?
The force acting is the upthrust of water and the equal and opposite force is the weight of balls
What is the resultant force
A single force that has the same effect as all the forces combined