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30 Cards in this Set

  • Front
  • Back
push or pull
mathematical equation of anything defined by its size or magnitude and its direction
ex. 59kg X 9.8
if wt lbs change to kg. weight divided by 2.2
static vs dynamic friction
static- dry friction between surfaces not moving
dynamic- dry friction between surfaces movong relative to each other
weight vs mass
mass meas of linear inertia. scalar. kg
wt meas of force of gravity. vector. N
linear motion
or translation
occurs when all pts of body or object move the same distance in same direction at same time
rectilinear and curvilinear translation
rectilinear translation
all pts on body or obj move in a straight line so the direction of motion does not change. all pts move same distance
curvilinear translation
all pts move so orientation of obj doesn't change and all pts move same distance. direction of motion canstantly changing
angular motion
or rotary motion/rotation occurs when all pts on a body or object move in circles about same fixed central line or axis
general motion
combination of angular and linear motions. ex running walking because trunkbis linear limbs angular
linear kinematics
angle or line of motion object moves. descrip of motion. speed velocity ex curvilinear angular
distance vs displacement
dis traveled length of path from st to end. displace. meas straight line initial pt to end pt. vector
speed vs velocity
speed rate of motion.. rate of distance traveled
velocity rate of motion in specific direction rate of displacement vector
instantaneous velocity
velocity of object at an instant in time
uniform acceleration
acc is constant doesnt change. occurs when net force is constant not changing
vector quantities
size and direction
horizontal projectile
constant. vertical velocity constantly chg at rate of 9.81.. any object flying through air has both
linear kinetics
forces acting on an object. ex push or pull
newtons first law
every body continues at state of rest or uniform motion in straight line unless compelled to chg by forces
linear momentum
product of objs mass and linear velocity.. faster obj moves more momentum
coefficient of restitution
absolute value of the ratio of the velocity of separation to the vel of approach. vel of separ is diff between vel of two colliding obj after collision (how fast moving away from each other.) vel of approach is diff between vel of two obj before collision
newtons second law
chg of motion of an obj is proportional to force impressed and is made in direction of straight line in which force is impressed
product of force and time during which the force acts
newtons third law
every action has an equal and opposite reaction
impulse momentum relation
increase duration forced applied increases ch in momentum
product of force and amount of displacement in direct of that force. unit joule or Nm
capacity to do work
kinetic energy vs potential energy
energy due to motion vs energy due to position
strain energy
energy due to deformation of an object
how quickly or slowly work is done