a push or pull that gives energy to an object

Force is measured in Newtons (N)

*forces that are opposite in direction and equal in force

*cause an object to stay at rest

*cannot change the motion of an object

*forces that are not opposite and equal (one force is greater than the other)

*always cause a change in motion

*when 2 unbalanced forces move in the same direction the combined force is added

*when 2 unbalanced forces move in the opposite direction,the combined force is subtracted

the force on an object after all the forces are

added together

*shows how strong the force is and its direction

* represented by an arrow- head of arrow shows direction of the force, width of arrow tells you the strength of the force.

states that an object will remain at rest or move at a costant speed in a straight line unless acted on byan unbalanced force

*friction made when 2 solid surfaces slide over each other

* amount of friction made depends on weight of the object that is mving and the kind of surface the object slides across

is the tendecy of an object to stay at rest or in motion: it is matter's resistance to change.

if it is at rest, it wants to stay not moving and if the object is moving, it doesn't want to stop moving

states that the unbalanced force acting on an object is equal to the mass of the object times its acceleration

Force = Mass X acceleraton

or

the acceleration of an object depends upon its mass and the applied force

*the force that resists the motion of an object

* friction works in the opposite direction, slowing it

down and finally stopping it

*friction made when an object rolls over a surface

*is due to the the force of gravity between the object and the earth

* all objects accelerate at the same rate , regardless of their mass

* is 9.8 m/sec/sec or 9.8 m/sec²

for every second an object is falling, its velcoity is

increased by 9.8 m/sec

*will slow down the downward force of an object

* all falling objects meet air resistance

* air resitance is a result of the force of friction

is when a falling body no long accelerates

* air resistance increases with velocity, so as a falling object speeds up, the air resistance against it gets bigger, until...

the pull of gravity = air resistance

states all objects in the universe attact to each other by the force of gravity

* size of the force depends on : Mass of the object and the distance between them

is equal to the mass of an object multiplied by its velocity

Mass = Mass x velocity

 the more momentum an object has,the harder it is to stop