Physics Forces
type of surface, how hard the surfaces are pressed together
2 things that sliding friction depends on (10 words total in this quizlet)
Newton's 2nd Law
A net force will cause a mass to accelerate. The acceleration of an object is directly proportional to the net force and inversely proportional to the mass. (name this law)
Newton's 1st Law
An object at rest will remain at rest. An object in motion will remain in motion, unless acted on by a outside force. (name this law)
Newton's 3rd Law
For every action there is an equal and opposite reaction. (name this law)
mass
_____ always stays the same, no matter if you're on the moon or mars. (weight/mass/gravity)
free body diagram
a pictorial representation of forces acting on an object complete with labels
net force
acceleration is directly proportional to:
mass
acceleration is inversely proportional to:
mass
amount of inertia depends on ______
rest
an object at rest will remain at _____
motion
an object in motion will remain in __________
no effect
effect of balanced forces on the motion of an object
acceleration
effect of net force on the motion of an object
weight
force due to gravity; how mass is affected by gravity
tension
force in ropes
friction
force that opposes motion
fluid friction
form of friction when an object moves through a fluid **any liquid or gas**
rolling friction
form of friction when one surface rolls across another (ex. ball bearings)
sliding friction
form of friction when one surface slides across another (hmm this is hard)
sigma F = ma
net force equation
inertia
one word describing Newton's 1st Law:
normal force
the force pushing up, perpendicular to surface
net force
the resultant of unbalanced forces is a ____ _____
kinetic friction
type of friction that acts during motion
static friction
type of friction that keeps an object in place and prevents it from moving
Newton
unit used to measure forces
kilograms
unit used to measure inertia
none
what keeps an object in motion once it is moving? ex. hockey puck
equilibrium
when the net force is zero, the object is in a state of _____________
static friction
which type of friction is greater? (static friction/kinetic friction)
