Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
average acceleration
|
the change in velocity divided by the time it takesto make the change
Units: meters per second |
|
|
average speed
|
distance traveled divided by the time taken
units: meters per second miles per hour |
|
|
average velocity
|
change in position divided by the time taken
|
|
|
displacement
|
a vector quantity giving the straight line distance and direction from an inital position to a final position
|
|
|
instantaneous speed
|
average speed for a very small time interval
|
|
|
magnitude
|
the size of a vector quantity
|
|
|
vector
|
a quantity with a magnitude and direction
|
|
|
velocity
|
a vector quantity the includes the speed and direction of an object
|
|
|
force
|
a push or pull
F (net) = ma units: N |
|
|
inertia
|
object's resistance to a change in its velocity
|
|
|
kinetic friction
|
frictional force between two surfaces in relative motion
|
|
|
mass
|
determines an objects inertia
units: kilograms |
|
|
Newton's first law of motion
|
the velocity of an object remains constant unless an unbalanced force acts on the object
|
|
|
Newton's second law of motion
|
the net force of an object is equal to its mass times its acceleration.
|
|
|
Newton's third law of motion
|
if an object exerts a force on a second object, the second object exerts an equal force back on the first object
|
|
|
newton
|
unit of force
|
|
|
static friction
|
frictional force bertween two surfaces at rest relative to eacho ther.
equal and oppposite to net applied force if the force is not large enough to movethe object |
|
|
terminal speed
|
the speed obtained in free fall when the upward forceof air resistance is equal to the downward force of gravity
|
|
|
weight
|
the force of gravitational attraction of Earth for an object
|
|
|
centripetal acceleration
|
acceleration of an object toward the center of its circular path
magnitude = v ^2 / r |
|
|
centripetal force
|
-the net force required to keep an object moving in a circular path
-force is directed towards the center -magnitude = mv^2 / r |
|
|
projectile motion
|
a type of motion that occurs near the Earth's surface when the only force acting on the object is that of gravity
|
|
|
translational motion
|
motion along a path
|
|
|
field
|
a region of space that has a number or vector assigned to every point
|
|
|
gravitational field
|
gravitational force experienced by a 1-kg mass placed at a point in space
|
|
|
law of universal gravitation
|
all masses exert forces on all other masses
|
