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Chapter 4 - Coggle Diagram
Chapter 4
Forces
Friction
Ff
Normal
FN
the force that is perpendicular contact force exerted by a surface on another object
Spring
Fsp
Tension
FT
force exerted by a string or rope
Thust
Fthrust
Weight
Fg
Weight = mass * 9.8
Measured by scales
Unit: N=kg *ms
Net force: the sum of all the forces on an object
Equilibrium: if the object has net force of 0
Force: push or pull
Drag force: the force exerted by fluid of an object moving a fluid; air counts as a fluid
Terminal velocity: drag force = terminal velocity
Can be modeled by a free body diagram
Free body diagram: a model that represents the forces acting on a system
Types of forces
Contact Forces
The force that is result of touching or contact
Field Forces
Forces without contact
e.g. gracity
magnetism
Unit: N
Units
Force: N
N: kg * m/s2
Mass: kg
Acceleration: m/s2
Newton's 3 Laws
1.) Law of Inertia
An object at rest will tend to stay at rest unless acted upon by an unbalanced force
2.) Law of Acceleration
F=ma
3.) Law of Action/Reaction
Every action has its equal opposite reaction
F(A on B) = -F(B on a)