Chapter 4 Newton's Laws Flashcards
Force
cause of motion
Kinematics
study of motion
Dynamics
considers the forces that affect the motion of moving objects and systems
net force
adding together all the forces acting on an object, the total force
External force
force that acts on an object within the system from outside the system
Net external force
total combined external force
free-body diagram
Represents the object being acted upon, that is, the free body, as a single point.
friction
External force that acts opposite to the direction of motion
Inertia
the tendency for an object at rest to remain at rest, or for a moving object to remain in motion in a straight line with constant speed
Law of inertia
The concept of inertia in law form
Mass
a measure of the amount of matter (or stuff) in an object
Newton’s Second Law of Motion
states how force causes changes in motion (f=ma)
freefall
when the net external force on an object is its weight, it is in ____ ____
weight
the gravitational force (W)
Newton’s third law of motion
whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude, but in the opposite direction to the force that it exerts.
