Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Newton's Second Law establishes that the acceleration of an object as produced by a net force is directly proportional to the net force and inversely proportional to the object's mass. Newton's Third Law specifies that for every action, there is an equal and opposite reaction. The document also defines key physics concepts such as force, momentum, mass, acceleration, and equilibrium.
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Newton's Laws and Forces Explained
1. Newton's First Law
An object at rest remains at rest unless an
unbalanced force acts on it.
2. Newton's Second Law
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The acceleration of an object as produced by a net
force is directly proportional to the magnitude of the
net force, in the same direction as the net force, and
inversely proportional to the mass of the object.
Equation: F=ma
Force= mass x acceleration
13. Free Body Diagram
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It is the diagram used to describe the forces acting
on an object and in which direction they are acting
on it. It shows the relation between the magnitude
and the direction of the forces.
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Normal Force
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Gravitational Force
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Applied Force
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Frictional Force
16. Friction
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Friction is the force that opposes motion.
Friction is more on the rough surfaces which slows
down the object's speed.
Friction is less on the smooth surfaces which moves
the object very smoothly.