43 terms

unbalanced force

a change in an object's state of motion is caused by an

newton

in the metric system, forces are measured in a unit called

inertia

is the property of an object which causes it to resist all changes in its state of motion

force

a _________ is an interaction between two objects

accelerated

an object is _______ when an unbalanced force acts on it

mass

acceleration of an object varies directly with the applied force and inversely with the ______ of the object

weight

is the measurement of the gravitational force action on an object

sliding

static friction is greater than _______ friction

resultant

a _________ is the sum of two or more vectors

dynamic equilibrium

an object moving at a constant velocity is in a state of

static equilibrium

an object at rest is in a state of

air resistance

the amount of _____ a projectile encounters depends on the projectile's velocity and surface area

scalar

mass and speed are examples of _____ quantities

vector

acceleration and force are examples of ______ quantities

3rd law

although _____ forces have the same magnitude and act in opposite directions, they cannot cancel each other since they act on different objects

terminal velocity

when the air resistance a projectile encounters as it is falling equals its weight, it reaches _____

free body diagram

a graphical technique used to illustrate all of the forces acting on an object

direction

objects are accelerating if there is either a change in their rate of motion, that is, their speed, or of there is a change in their _______ of motion

same

2nd law forces are forces which act on the _______ object

weight

in free fall, the only force acting on an object is the pull of gravity. This force is measured quantitatively by the object's ________

newton

______ and Galileo contributed most to our understanding of motion

kinematics

__________ is the study of motion without regard to forces

dynamics

__________ is the study of the relationships that exist between forces and the motion of objects

stronger

electromagnetic forces are ________ than gravitational forces

unbalanced force

unless acted upon by a(n) ___________, an object at rest or in a state if uniform motion will remain at rest or in uniform motion

accelerated

an object is ______ when an unbalances force acts on it

newton

a net force of one _______ gives a mass of 1 kg an acceleration of 1 m/s^2

mass

acceleration of an object varies directly with the applied force and inversely with the _______ of the object

mass

_________ depends upon the amount of matter in an object and is independent of the location of the object

gravitational

the ______________ method of measuring mass is easier and more widely used than the inertial method

friction

is a force that opposes the motion of an object

normal

the force of friction depends upon the type of surfaces in contact and the _________ force

greater

static friction is ______________ than kinetic friction

equal and opposite force

complete the following statement: " every force is accompanied by a(n) _________________"

force applied

Fa

force of gravity (weight)

Fw

normal force

Fn

frictional force

Ff

air resistance force

Fair

tension force

Ft

spring force

Fs

upward force

Fup

coefficient of friction

μ