definition of force
Forces cause changes in an object's velocity.
SI unit of force
Newton
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definition of force
Forces cause changes in an object's velocity.
SI unit of force
Newton
types of force
Forces are either pushes or pulls
Contact forces
Arise from physical contact between objects
what is Newtons first law
An object persists in its state of rest or uniform motion unless acted upon by an unbalanced, external force.
what is inertia
The natural tendency of an object to resist acceleration.
what is gravity’s affect on objects
constantly acts on objects
what are balanced forces
When multiple forces on an object cancel each other out.
what is newtons second law
The acceleration of an object is directly proportional to the net external force acting on it and inversely proportional to its mass.
what is mass
the amount of stuff in an object
what is weight
the Gravitational force exerted by the earth on an object
what is newtons third law
For every action, there is an equal and opposite reaction.
what is equal magnitude
Forces exerted by interacting objects are equal in magnitude.
what is opposite directions (forces)
Forces exerted by interacting objects are opposite in direction.
what is a free body diagram
Represent forces acting on an object.
how to draw a Free body diagram
Only include forces acting on the object of interest.
Do not assume the normal force equals the weight force.
Model the object as a particle (dot).
what is Normal Forces
Force perpendicular to the surface.
what is force of gravity
Force exerted by gravity on the object.