chapter 3 Flashcards
kinetics vs kinematics
kinetics is forces of motion
kinematics is description of motion
newtons first law
law of inertia
inertia
resistance of an object to changing motion
if an object is at rest and the net external force acting on it is zero, the object
remains at rest
if an object is in motion and the net external force acting on it is zero, the object
continues moving at a constant velocity in a straight line
if an object is at rest, the net external force is
0
if an object is in motion at a constant velocity in a straight line, the net external force is
0
linear momentum
quantifies current state of motion and resistance to change
L=mv
elastic collisions
two objects in a system collide head on and separate
coefficient of restitution
ratio between the velocity of separation and the velocity of approach
difference between the post impact velocities of two colliding objects
velocity of separation
velocity of approach
difference between the preimact velocities of two colliding objects
coefficient of resolution letter
e
newtons second law
law of acceleration
newton second law equation
EF=ma
newtons second law: ___ is the effect of force
acceleration
newtons second law: lifting a 4.5kg bar upward in your hand, why must your hand force be +45N
to get 0 movement
product of average force and duration of force application
impulse
impulse changes
momentum, velocity
impulse to increase momentum examples
throwing, hitting, push off, thrust
impulse to decrease momentum example
catching, landing, giving
newtons third law
law of action-reaction
law of action-reaction
for every action, there is an equal and opposite reaction
