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AP Physics 1: Dynamics Cards

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Newton's 3rd Law

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Terms in this set (36)

Newton's 3rd Law

when two objects interact, the forces on the objects from each other are always equal in magnitude and opposite in direction

Static Friction

amount of force to start an object moving, velocity and acceleration are zero, sum of the forces is zero

Kinetic or Sliding Friction

resistance force between two surfaces already in motion, the magnitude of this force is less than magnitude of static friction

The larger the coefficient of friction, the more...

difficult it is to slide an object

Friction will always act in the direction....

opposing motion

when two blocks are connected by a cord that passes over a frictionless pulley, a = g(-m1 + m2) / (m1 + m2)

List some everyday forces

compression, gravity, tension, magnetic, friction

Newton's 1st Law

law of inertia, an object keeps its current state of motion unless acted upon by an unbalanced force

a push or a pull, in Newtons, a vector

Free Body Diagram

how forces are represented on an object

the combination of all forces acting on an object, when the net force of an object is equal to zero, there is no change in the object's state of motion

Newton's 2nd Law

when an unbalanced force is exerted on an object, the object accelerates in the direction of the net force

Equation for Newton's 2nd Law

Net force = (mass)(acceleration)

What should you ALWAYS start problems off by doing?

FBD, Newton's 2nd Law equation

Static Equilibrium

objects at rest