25 terms

# Conceptual Physics Chapter 4: Newton's Second Law of Motion

#### Terms in this set (...)

Force
A push or a pull exerted on an object, measured in newtons.
Friction
The resistive force that opposes the motion or attempted motion of an object either past another object with which it is in contact or through a fluid.
Mass
The quantity of matter in an object. More specifically, it is the measure of the inertia or sluggishness that an object exhibits in response to any effort made to start it, stop it, deflect it, or change in any way its state of motion.
Weight
The force upon an object due to gravity.
Kilogram
The fundamental SI unit of mass.
Newton
The SI unit of force. One newton (symbol N) is the force that will give an object of mass 1 kg an acceleration of 1 m/s^2.
Volume
The quantity of space an object occupies.
Newton's second law
The acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object.
Free fall
Motion under the influence of gravitational pull only.
Terminal speed
The speed at which the acceleration of a falling object terminates because air resistance balances gravitational force.
Terminal velocity
Terminal speed with direction specified.
Net force
The combination of forces acting on an object.
Acceleration
The rate at which velocity changes with time.
Static friction
A force that must be overcome to move an object at rest. ( the friction that exists between a stationary object and the surface on which it's resting. )
Sliding Friction
The force of resistance created by two objects sliding against each other.
Fluid Friction
The force that resists the movement of a solid object through a fluid (liquid or gas)
Velocity
a physical vector quantity; both magnitude and direction are needed to define it
directly
Acceleration is ____ proportional to the net force
Inversely
Acceleration is ____ proportional to the mass
Normal Weight
weight when you're not accelerating (like in the bathroom)
In this situation you're weight will equal the force of gravity on you.
Apparent weight
your weight when you are accelerating. Like when in freefall on the tower of terror. Or for example, an elevator when ACCELERATING.