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MCAT Physics (Chapter 1: Kinematics and Dynamics ((Kinematics Equations…
MCAT Physics
Chapter 1: Kinematics and Dynamics
Gravitational Force (all objects exert gravitational forces on the other but what is felt depends on how massive each body is). F=Gmm/r^2
Static Friction exists between stationary object and the surface of the object upon which it rests and kinetic friction exists between a sliding object and the surface over which the object slides. The coefficient of static friction will always be larger than the coefficient of kinetic friction. It always requires more force to get an object to start sliding than it takes to keep an object sliding.
Review Right Hand Rule for Magnetism and Torque
Newton's Laws
First Law is Fnet=ma=0
Second Law is Fnet=ma
Third Law is Fab=-Fab
Meaningful measurements on the atomic scale include Angstroms (1A=1 x 10^-10) and Electron-Volts (1eV=1.6 x 10^-19 J).
The Most Important Point is Quickly Converting Orders of Magnitude Differences
Kinematics Equations
square the initial equation and multiple acceleration by 2x
x=vt
multiply the first equation by time and multiply the acceleration portion by one half or the distance traveled is the sum of the distance traveled due to the objects velocity and acceleration
velocity equals equals initial velocity plus the amount of time the object is accelerating multiplied the magnitude of its acceleration
Air Resistance is Frictional Component of Free Fall that creates a drag force that can eventually equal the weight of the object until the object reaches its terminal velocity.
Relate this to buoyancy.
Inclined Plane: mgsin@ always forward component and normal force always equals mgcos@ the vertical gravitational component
Draw Free Body Diagrams. What Forces are at Play? Equilibrium problems make acceleration both rotational and translational equal to zero. This is a reiteration of Newton's First Law.
For circular motion an objects tendency is to move outward but centripetal force keeps the object moving inward. The force is equal to mv^2/r