Revision resources...click below...
NZQA Mechanics Examination Papers..click below..
These are worth checking out !!!
motion_notes.ppt  
File Size:  228 kb 
File Type:  ppt 
Motion this is the "way" something is moving an object is in motion if its position is changing...Characteristics of motion are:
Objects have a speed, they travel a distance, have direction and could be accelerating or slowing down.
Objects have a speed, they travel a distance, have direction and could be accelerating or slowing down.
When describing the motion of an object like a car we use quantities like time, distance , speed and acceleration.
SPEED  is the "rate" at which an object is moving.
To calculate Speed we use the equation: SPEED = DISTANCE / TIME
Because most times the direction of the object is always given we use Velocity as our speed. Velocity is speed in a certain direction.
Average Speed  is a measure of distance traveled each hour, min or second. The average speed (v) for a journey is calculated from the TOTAL distance travelled divided by the TOTAL time taken
SPEED  is the "rate" at which an object is moving.
To calculate Speed we use the equation: SPEED = DISTANCE / TIME
Because most times the direction of the object is always given we use Velocity as our speed. Velocity is speed in a certain direction.
Average Speed  is a measure of distance traveled each hour, min or second. The average speed (v) for a journey is calculated from the TOTAL distance travelled divided by the TOTAL time taken
Instantaneous Speed  is the actual speed at any moment  for example if you looked down at the speedometer whilst travelling in the car  the speed at that particular instant in time would be termed the instantaneous speed of that object  it will usually change considerable during a car's journey.
If it does NOT change then that objects speed is termed constant, uniform or steady !
DISTANCE  TIME GRAPHS:
These graphs plot the objects journey from start to end point.
They can be used to calculate the average speed AND the SLOPE of the graph also gives us information about the objects speed !!
Check out the video below !!
If it does NOT change then that objects speed is termed constant, uniform or steady !
DISTANCE  TIME GRAPHS:
These graphs plot the objects journey from start to end point.
They can be used to calculate the average speed AND the SLOPE of the graph also gives us information about the objects speed !!
Check out the video below !!
ACCELERATION:
FORCES:
Forces are a push, pull or a twist.
A Force is something which will change the motion of an object. A Force applied to an object may change the objects speed, direction or shape !
(If the force causes an object to speed up = accelerate or slow down = decelerate)
Forces act on everything !!! Often there is more than one force acting on an object. When this happens it is the resulting combination of all the forces acting that will affect the MOTION.
The Resultant force is called the Net Force  F net . Forces acting in the same direction are added together  forces acting in opposite directions are subtracted and the difference/result becomes the NET FORCE !
A FORCE F  has both a size and direction. The size of the force is measured in Newtons N and the direction of the force is shown with an arrow !
When all the forces acting on an object are BALANCED  then the Net Force is zero. If the object is already moving then it will move at at CONSTANT speed. If it is not moving then it will remain STATIONARY.
When forces acting on an object are UNBALANCED  there is a NET FORCE acting and the object will ACCELERATE and DECELERATE  in the direction of the Net Force!
AIR RESISTANCE:...how does this work ?
Forces are a push, pull or a twist.
A Force is something which will change the motion of an object. A Force applied to an object may change the objects speed, direction or shape !
(If the force causes an object to speed up = accelerate or slow down = decelerate)
Forces act on everything !!! Often there is more than one force acting on an object. When this happens it is the resulting combination of all the forces acting that will affect the MOTION.
The Resultant force is called the Net Force  F net . Forces acting in the same direction are added together  forces acting in opposite directions are subtracted and the difference/result becomes the NET FORCE !
A FORCE F  has both a size and direction. The size of the force is measured in Newtons N and the direction of the force is shown with an arrow !
When all the forces acting on an object are BALANCED  then the Net Force is zero. If the object is already moving then it will move at at CONSTANT speed. If it is not moving then it will remain STATIONARY.
When forces acting on an object are UNBALANCED  there is a NET FORCE acting and the object will ACCELERATE and DECELERATE  in the direction of the Net Force!
AIR RESISTANCE:...how does this work ?

PRESSURE:
This is how much Force is put into a particular area.So the amount of pressure depends of 2 things
.....
This is how much Force is put into a particular area.So the amount of pressure depends of 2 things
.....
GRAVITATIONAL POTENTIAL ENERGY:
This is the Energy stored in an object whenever you lift or swing that object.
The object gains whatever the energy was, that was needed to move it ie: it is often referred to as the energy an object has because of its "position".
If you have to do work on an object, then energy gets stored on/in it
This is the Energy stored in an object whenever you lift or swing that object.
The object gains whatever the energy was, that was needed to move it ie: it is often referred to as the energy an object has because of its "position".
If you have to do work on an object, then energy gets stored on/in it
 Eg: you lift a suitcase off the floor onto the bed  you do work against the force of gravity so the suitcase gains Gravitational Potential Energy. You move it off the bed back onto the floor  it loses Gravitational Potential energy (that is had gained)