NEWTON’S LAWS
Force
A push or pull on an object in an attempt to change the object’s
state of rest or motion
Has magnitude and direction
Measured in Newtons (N)
Tension
Force that is transmitted through a string, rope, cable or wire when
it is pulled tight by forces acting on opposite ends
Normal force
The force or component of a force which a surface exerts on an
object with which it is in contact, and which is perpendicular to the
surface
Gravitational force
The Earth exerts a gravitational force on any object on or near its
surface, known as weight
Non-contact force
Fg= mg (g=9,8 ms-2)
9,8 ms-2is gravitational acceleration
Directed downwards towards the centre of the Earth
Frictional Force
A contact force that opposes the motion of an object and which
acts parallel to the surface
Static Frictional force
The force that opposes the tendency of motion of a stationary
object relative to a surface
Ranges from 0fsmax
Maximum Static friction
Affected by two factors:
1. Normal force
2. Material of the surfaces
Co-efficient of friction
Value that is experimentally determined and depends on the two
materials interaction
Ranges from 0-1
Force
A push or pull on an object in an attempt to change the object’s
state of rest or motion
Has magnitude and direction
Measured in Newtons (N)
Tension
Force that is transmitted through a string, rope, cable or wire when
it is pulled tight by forces acting on opposite ends
Normal force
The force or component of a force which a surface exerts on an
object with which it is in contact, and which is perpendicular to the
surface
Gravitational force
The Earth exerts a gravitational force on any object on or near its
surface, known as weight
Non-contact force
Fg= mg (g=9,8 ms-2)
9,8 ms-2is gravitational acceleration
Directed downwards towards the centre of the Earth
Frictional Force
A contact force that opposes the motion of an object and which
acts parallel to the surface
Static Frictional force
The force that opposes the tendency of motion of a stationary
object relative to a surface
Ranges from 0fsmax
Maximum Static friction
Affected by two factors:
1. Normal force
2. Material of the surfaces
Co-efficient of friction
Value that is experimentally determined and depends on the two
materials interaction
Ranges from 0-1
