Chapter 2 Flashcards
vector
any quantity that has magnitude and direction
scalar
quantities that have magnitude, algebraic sign, and unites, nut it does not have direction
Resultant vector
The sum of two or more vectors
Tail to head method
the tail of the first vector must correspond with the tail of the resultant and the head of the second must correspond with the head of the resultant
components of vectors
Vectors parallel to the x and Y axis that make up the vector. They have magnitude and an algebraic sign, which indicates its direction along the axis
resolving a vector
the process of finding the components of a vector
Net force
The vector sum of all the forces acting on an object
Newtons first law
The velocity vector of an object remains the same if and only if the net force acting on an object is zero
inertia
resistance to changes in velocity
Equilibrium
point at which net force acting on an object is zero, acceleration is zero (forces are balanced)
Transitional equilibrium
movement at a constant velocity without change in direction.
Interaction pair
The forces that two objects exert on each other,
Newtons third law
In an interaction between two objects, each object exerts a force on the other equal in magnitude ,but in different directions.
newtons law of universal gravitation
Any two objects exert gravitational forces on each other, directly proportional to the masses of the objects and inversely proportional to the square of the distance between their centers
long range forces
acts between two objects that do not have to be in contact.
