Section 1
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torque
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Last updated
4 years ago
Date created
Mar 14, 2020
Cards (53)
Section 1
(50 cards)
torque
-a property of force that makes an object rotate - NOT A FORCE
kinetic friction
occurs when there is relative motion (when there's sliding)
newton
kg m/s^2 unit of force
static friction
occurs when there is relative motion between the object
gravitational force
r is the distance between the two objects
potential energy
the energy an object or system has by virtue of its position Ug- gravitational potential energy △Ug= -W by gravity △Ug= mgh
average velocity
displacement/ time △x/△t
centripetal acceleration
centripetal= towards the center
mu
coefficient of friction
conservation of momentum
-the total linear momentum of an isolated system remains constant total p initial = p final
inertia
the property of objects to naturally resist changes in their states of motion
momentum
vector quantity given by p= mv
tow dimensional vectors
vectors that lie flat on a plane and can be written as the sum of a horizontal and vertical vector
scalar
a quantity that does not involve direction twp
transitional equilibrium
-sum of all forces acting on an object is 0 F net=0
gravity
-10 m/s^2
Newton's first law
an object at rest will stay at rest and an object in motion will stay in constant velocity unless a net force acts on it (law of inertia)
Newton's third law
for every action there is an equal but opposite reaction (action/ reaction pair)
law of conservation of total energy
Ki + Ui = Kf +Uf (initial mechanical energy Ei = final mechanical energy Ef)
average speed formula
total distance/ time d/t
work
-scalar -if a force F acts over a distance d and F is parallel to d, then the work done by F is the product of force and distance W=Fd
Newton's second law
friction force
the component of the contact force that's parallel to the surface
kinetic energy
the energy of an object due to motion K= (1/2)bh
work energy theorem
center of mass
universal gravitational constant (G)=
newton's law of gravitation
any two objects in the universe exert an attractive force on each other called the gravitational force
slope of velocity-versus-time graph
acceleration
vector
quantity that involves both magnitude and direction
velocity
speed plus direction
total mechanical energy
the sum of an object's kinetic and potential energies, denoted by E E= K+U
weight (of an object)
the gravitational force exerted on it by the Earth or whatever planet Fw or Fg= mg
position
location in some point in space
elastic potential energy
Us= (1/2) kx^2
area between the graph and the t axis on a velocity-versus-time graph
object's displacement
centripetal force
impulse
-pushing on an object for a certain amount of time -impulses cause a change in momentum -vector J= F△t or J=△p
uniform circular motion
-speed is constant velocity is not because the direction of velocity is always changing -in order to product acceleration there must be a force
kinematics
mathematical tools for describing motion in terms of displacement, velocity, and acceleration
power
the rate at which one does work given by P= W/t or P=Fv
rotational equilibrium
T net = 0
F static friction, max=
mus (FN) coefficient of friction x normal force
work at an angle
-a fore applied perpendicular to the intended direction of motion always does ZERO work
displacement
change in position
acceleration
change in velocity/ time △v/△t
free-body (or force) diagram
normal force
component of force that's perpendicular to the surface
slope of position-versus-time graph
velocity
F kinetic friction=
muk x FN
Section 2
(3 cards)