Studied by 24 peopleTags & Description
Velocity
force pair
The action and reaction pair of forces that occur in an interaction.
Free Fall
motion under the influence of gravitational pull only
Interaction
a mutual action between objects where each object exerts an equal and opposite force on the other
Newton's First Law of motion
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's Second Law of Motion
The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object.
Newton's Third Law of Motion
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
Terminal Speed
The speed at which the acceleration of a falling object terminates when air resistance balances its weight.
Terminal Velocity
Terminal speed in a given direction
force pair
The action and reaction pair of forces that occur in an interaction.
Free Fall
motion under the influence of gravitational pull only
Interaction
a mutual action between objects where each object exerts an equal and opposite force on the other
Scalar quantity
A quantity that can be completely specified by its magnitude
Acceleration
the rate at which velocity changes with time; the change in velocity may be in magnitude or direction or both. usually measured in units of m/s^2
Air Resistance
the force of friction acting on an object due to its motion in air
Equilibrium Rule
the vector sum of forces acting on an object that is not accelerating is 0
Force
a push or pull
Free Fall
falling under the influence of gravity only - falling without air resistance
Friction
the force that opposes motion
Hang Time
the time that one's feet are off the ground during a vertical jump
Inertia
the property by which objects resist changes in motion
Kilogram
unit of mass. one kg is the mass of 1 L of water at 3^0 c
Mass
the quantity of matter in an object. more specifically a measure of the inertia that an object exhibits
Net Force
The combination of all forces acting on an object
Newton
SI unit of force
Support Force
the upward force that balances the weight of an object on a surface
Speed
The distance an object travels per unit of time
Vector quantity
a quantity that has both magnitude and direction
vector
an arrow that represents the magnitude and direction of a quantity
Velocity
The speed of an object and specification of its direction of motion
Volume
the quantity of space an object occupies
weight
How hard you push on a support force
dynamic equilibrium
equilibrium when you are moving
What will help you answer the most questions on the exam?
Zero net force = Equilibrium = Zero Acceleration = Constant velocity (can be zero/ at rest)
are satilites in equilibrium?
No because they are constantly turning.
Why do all freely falling objects accelerate at 9m/s/s?
Because they all have the same mass to weight ratio.
What do we measure weight in?
Newtons
What do we measure mass in?
Kilograms
Note
Flashcard