Free Body Diagrams (FBDs)
Where the forces are drawn from in a Free Body Diagram
The middle (center of mass)
The equation for Newton's Second Law
Net F=ma (Net Force=mass x acceleration)
The time taken for one full revolution to be completed in circular motion is defined as
The period (T)
The reaction between two forces that resists relative motion
Friction
True or False: Contact is required for gravitational force
False, gravity is a field force
The direction that a force should be pointing relative to the object
away from
The unit of measurement for acceleration
m/s (meters per second)
True or false: an object moving in a circular path at a constant velocity is not accelerating
false (the object is consistently changing direction, therefore accelerating)
The difference between kinetic and static friction
One is the force that opposes an object from beginning to move from rest (static friction) while the other opposes an object from continuing to move while already in motion (kinetic friction)
The equation for force of gravity
Fg= mg (force of gravity is equal to the product of the mass of an object and the acceleration due to gravity).
Represented by the length of arrows in a FBD
magnitude of the forces
The relationship between acceleration and mass
acceleration is proportional to 1/mass (inversely proportional)
The direction that centripetal force and acceleration act in
Towards the center of the circular path
The type of friction that can cause an object to accelerate
static friction
The acceleration due to gravity
9.8 m/s (accepted 10 m/s)
What the forces on an object sum to when the object is not accelerating
Zero (0)
Increasing mass also increases _____ proportionally
Net force
ac= v2/r (centripetal acceleration is equal to the velocity squared divided by the radius)
A variable that affects the amount of friction between two surfaces
Surface area, type of surface, speed of object, weight, and tension or pull force
Mass is the measurement of
The amount of matter that makes up an object
The practice of breaking forces down into their parallel and perpendicular parts
Components (finding the components)
acceleration occurs in the same direction as this force
net force
The equation that is derived from Newton's Second Law that identifies the net force, or cause, for centripetal acceleration
net F= mv2/r (net force is equal to the mass times the velocity squared, with the product of those two divided by the radius)
For any two surfaces, this coefficient of friction is always larger than the other
static friction
In the equation Fg= G m1m2/r2, or the equation for Universal Gravitation, r represents
The distance between the center of masses of two objects or planets