Studied by 15 people
motion
is a change in an object’s position relative to the reference point.
displacement
is the distance and direction of the objects change in position.
speed (write out)
is the distance an object travels per unit of time.
average Speed
is the total distance traveled divided by the total time of the travel.
velocity
includes the speed of an object and the direction of its motion.
acceleration (write out)
is the rate of change of velocity.
momnentum
of an object is the product of its mass and velocity.
force
is a push or pull.
friction
is the force that opposes the sliding motion of the two surfaces that are touching each other.
Inertia
is the tendency of an object to resist any chance in its motion.
air resistance
is a friction like force that opposes the motion of objects that move through air.
terminal velocity
is the maximum speed an object will reach when falling through a substance, such as air.
free fall
is the only force acting on an object
centripetal force
is a force exerted toward the center of a curvved path. 0
Unbalanced force
are not equal in all directions. (WILL cause change in motion.)
weight
the measurement of gravitational force exerted on an objects mass.
net force
the sum of all forces acting on an object.
mass
a measurement of the quantity of matter in an object.
g
accleration of falling object due to gravity in a vacuum. 9.8 m/s2
projectile
anything that is thrown or shot through the air.
balanced force
forces acting on an object that are equal in size but opposite in direction.
mircowelds
the source of friction between two surfaces pressed together.
gravity
is an attractive force between any 2 objects that depends on the masses of the objects and distance between the onjects.
sliding
opposes motion of 2 surfaces sliding past each other & is caused by mircowelds constantly breaking & forming as object slides
rolling
static friction acting over area, surfaces are in contact.
Newtons 1st law of motion
An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an outside force.
Newtons 2nd law of motion
The acceleration of an objects depends on the mass of the object and the net force acting on an object.
Newtons 3rd law of motion
For every action force there is an equal but opposite reaction force.
3 factors that affect whether an object will reach terminal velocity
Height, mass, and surface area
4 factors that affect the amount of friction between the surfaces of objects
type of material, texture/roughness, amount of force, and surface area.
2 factors that affect the amount of air resistance acting on an object.
surface area(size and shape), and velocity
2 factors that determine how much gravitatonal force will be exerted between two objects
The mass of the objects and the distance between the 2 objects.( mass and distance)
Law of Conservation of momentum
if no external forces act on a group of objects, their total momentum doesn’t change.
strong nuclear force (1 of the 4 of fundamental forces)
golds nucleus together
electromagnetic( 1 of the 4 of the fundamental forces)
force between charged particles
weak nuclear (1 of the 4 fundamental forces)
force that decays neutron and proton
gravity( 1 of the 4 fundamental forces)
force between two objects
speed formula
s= d/t
speed unit
m/s
velocity formula
v= d/t
velocity unit
m/s & direction
momentum formula
p= m x v
momentum unit
kg x m/s
accerleration formula
a= Vf-Vi/t
acceleration unit
m/s to the second power
force formula
F= m x a
force unit
N , kg, m/s
weigth formula
W= m x g
weight unit
N. kg, N/kg
Note
Flashcard