Physics Term 2
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9 Terms
Force
A push, pull or twist
Measured in newtons (N)
Newtons First Law states
An object will stay at rest or continue moving at a constant speed in a straight line unless acted upon by a net external force
Inertia
The tendency of an object to resist changes in motion
More mass = more inertia
Objects with greater inertia are harder to start, stop or turn (change motion)
Example of inertia
A truck will have more inertia than a bicycle
Inertia and mass relationship
An objects inertia is directly related to its mass and the rate of change of velocity
Greater the mass and rate of change of velocity the greater the inertia.
Resultant force
The overall force acting on an object
A lager set resultant force forward =
Acceleration
Equal size force =
Constant speed or stationary
Lager Force backwards =
Deceleration