Term
|
Definition
| the organization of the universe |
|
|
Term
| it builds understanding of __________ that govern the universe |
|
Definition
|
|
Term
| allows _________ and ___________ of natural laws |
|
Definition
|
|
Term
| speed- the measure of hte _________ in a give amount of ________ |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| distance- how _____ an obeject in motion travels (in ___) |
|
Definition
|
|
Term
| displacement the __________ of an object in motion from initial position to final position. |
|
Definition
|
|
Term
| velocity- change in _______ of an object over a __________ |
|
Definition
| displacement, time interval |
|
|
Term
| constant speed- objects do not _____ or ____________. Objects cover _________ amount of distnaces each ___ interval. |
|
Definition
| speed up, slow down, time |
|
|
Term
| constant velocity- constant speed in ___________ |
|
Definition
|
|
Term
| a graph shows how _________ are related with a picture |
|
Definition
|
|
Term
| independent variable- this is the variable that you as the experimenter are free to change. It is usually plotted on the ________ or the ___ axis. It is sometimes called the ____ variable. |
|
Definition
| horizontal, x, manipulated |
|
|
Term
| dependent variable- the value of this variable depends on changes in the independent variable. It is plotted on the __________ or _______ axis. IT is sometimes called the ___________. |
|
Definition
|
|
Term
to remember varibles:
its all about HIM
on VD you want R |
|
Definition
horizontal, independent, manipulated
vertical, dependent, responding |
|
|
Term
| a graph can be used as a __ to make _______ based on the relationship between x and y variables. |
|
Definition
|
|
Term
Graph Relationship:
strong relationship between variables- this means that a _____ change in one variable causes a _______ change in another variable. |
|
Definition
|
|
Term
Graph Relationship:
no relationship between variables- a change in one variable has _______ effect on the other variable |
|
Definition
|
|
Term
Graph Relationship:
weak relationship between variables- a big change in one variable has _____ effect on the other variable. |
|
Definition
|
|
Term
Graph Relationship:
inverse relationships- when one variable increases, the other variable ________. |
|
Definition
|
|
Term
| acceleration is the _ in the ______ of an object |
|
Definition
|
|
Term
| a "rate of change" means the ratio of ________ in one variable divided by how much ________ the change takes. |
|
Definition
|
|
Term
| units for acceleration are: |
|
Definition
|
|
Term
|
Definition
change in speed
change in time |
|
|
Term
| acceleration can be in the ____ direction as an object's speed or it can be in the ________ direction |
|
Definition
|
|
Term
| speed ________ when acceleration is the in the _____ direction adn _______ hwen acceleration is in the ___ direction as the speed. |
|
Definition
increases, same
decreases, opposite |
|
|
Term
| when speed and acceleration have hte same sign, speed ______. when speed and acceleration have opposite signs, speed _______. |
|
Definition
|
|
Term
| an object has ______ acceleration if it is traveling at a constant speed in one direction. |
|
Definition
|
|
Term
| constant acceleration means that speed changes by the ____ amount for every interval of time. |
|
Definition
|
|
Term
| an object can have _______ with zero speed |
|
Definition
acceleration.
(ex. throwing a ball up into the air. it travels in one direction, slows down, stops, then stars traveling in the opposite direction.) |
|
|
Term
slope- rise/run
acceleartion= ?/? |
|
Definition
|
|
Term
| when the slope of the graph is steeper, that represents ____ acceleration. |
|
Definition
|
|
Term
| a negative value for the slope indicates _______- acceleration. |
|
Definition
|
|
Term
| from a speed vs. time graph, the area under the curve represents __________ |
|
Definition
|
|
Term
| free fall- an object is in free fall if it is falling due to the influence of ______ only. |
|
Definition
|
|
Term
| gravity on earth causes all objects to accelerate at the same rate _________ toward the _________. |
|
Definition
|
|
Term
| The accelration due to gravity is given the symbol _____ |
|
Definition
|
|
Term
| all objects, regardless of whether they are large or small, fall at hte ______ in the absence of air resistance |
|
Definition
|
|
Term
| air resistance is a force exerted on objects moving through the air. You have felt this force if you have ever hung your arm out hte window of a moving car. Air resistance acts to ______ the speed of falling objects, but may be ignore for objects with a small surface area and large mass. |
|
Definition
|
|
Term
| the maximum speed with which an object falls through the air when limited by air resistance is ________. |
|
Definition
|
|
Term
| terminal speed depends on _____, ________, and ______. |
|
Definition
|
|
Term
| force- a ---- or a ---- on an object. |
|
Definition
|
|
Term
|
Definition
|
|
Term
| force is a vector quantity- in other words it has magnitude and ________ |
|
Definition
|
|
Term
| new force- vector sum of all _____ acting on an _________ |
|
Definition
|
|
Term
| when all forces acting on an object are balanced, the object has _________. |
|
Definition
|
|
Term
| when all the forces acting on an object do not add up to zero, an object's motion will change- it will not move at a __________________________________ or stay ______________. |
|
Definition
| constant velocity in a straight line, at rest |
|
|
Term
| Newton's first law- an object ----- remains ----- and an object ----- remains ----- with a ----- velocity unless acted upon by a ---- external ---. |
|
Definition
at rest, at rest
in motion, in motion, constant
net, force |
|
|
Term
| newtons first law is often referred to as the ________ |
|
Definition
|
|
Term
| inertia is a property of an object's |
|
Definition
|
|
Term
|
Definition
| tendency of an object to resist changes in it's motion |
|
|
Term
| large mass implies _____ inertia and ____ mass implies _______ inertia |
|
Definition
|
|
Term
| It does not take a ____ to keep an object moving. It takes a _____ to stop the object |
|
Definition
|
|
Term
| A .4 kg puck is moving horizontally across an air hockey table with a speed of 4 m/s. How much net force is require d to keep the puck moving at this speed and in this direction? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| the unit of force, the ____, can be broken down to the units for mass and acceleration= 1 ____ = 1 kg/ms2 |
|
Definition
|
|
Term
| the direction of the net force and the acceleration will be the |
|
Definition
|
|
Term
| zero acceleration would mean the net force is also zero and this state is called |
|
Definition
|
|
Term
| Free body diagrams- to determine whether an object will accelerate, we need to konw the _________. a diagran shows all the forces acting ON an object is called a free body diagram. |
|
Definition
|
|
Term
| Newton's second law- the ------- of an object is ---- proportional to the net external force acting on the object and --------- proportional to the ----- of the object. |
|
Definition
| acceleration, directly, indirectly, mass |
|
|
Term
| Newton's third law- for every ---- there is an ---------- |
|
Definition
| action force, equal, opposite reaction force |
|
|
Term
action reaction forces always:
occur in -----
act on ------- ------- |
|
Definition
occur in pairs,
act on different objects |
|
|
Term
| why dont action reaction pairs cancel each other out? |
|
Definition
| they act on different objects. |
|
|
Term
| a scalar quantity that can be completely described by one value- the ______- |
|
Definition
|
|
Term
| examples of scalar quantities |
|
Definition
| energy, temperature, time, pressure, distance, height, mass |
|
|
Term
| vectors require -------- and ----- to completely describe the measurement. |
|
Definition
|
|
Term
|
Definition
| weight, veloctiy, acceleration, momentum |
|
|
Term
| to combine vectors use the ______ method |
|
Definition
|
|
Term
| projectile- something moving through teh _______ only onder the affect of _____- |
|
Definition
|
|
Term
| the path a projectile follows is called a -------. The equation that describes the path of a projectile forms a __----- shape. |
|
Definition
|
|
Term
| teh magnitude of a velocity vector is the |
|
Definition
|
|
Term
| once an object is travelling only under the influnece of gravity, the ----- motion and the ----- motions are ------ of each other. |
|
Definition
| horizontal, vertical, independent |
|
|
Term
| a projectile travels under the influence of gravity |
|
Definition
|
|
Term
| range or horizontal distance depends on the ------- ------ and the ------- -------./ |
|
Definition
| launch angle, launch velocity |
|
|
Term
| a launch angle of ----- degrees evenly divides the horizontal and vertical components of velocity and thus gives the ----- range |
|
Definition
|
|
Term
| mass- the amount of ---- an object contains |
|
Definition
|
|
Term
|
Definition
|
|
Term
| does an objects mass vary with location? |
|
Definition
|
|
Term
| weight- the force of ----- acting on an object |
|
Definition
|
|
Term
| the strenght of gravity is not constant throughotu the universe. so, weight 0000 vary as location changes |
|
Definition
|
|
Term
| when is an object weightless? |
|
Definition
| when no force of gravity is acting on you. |
|
|
Term
| weightlessness can occur ==== or ===== |
|
Definition
|
|
Term
| when an object is in equilibrim, all the forces acting on the object 000000. |
|
Definition
|
|
Term
| normal force- means ----- |
|
Definition
|
|
Term
| normal force is perpendicular to the ---- on which an object is placed |
|
Definition
|
|
Term
| frictional forces ----- or ----- motion. |
|
Definition
|
|
Term
| friction results when a force is applied to an object in contact with a surface and is caused by ----- in the ----- |
|
Definition
| imperfections, two surfaces |
|
|
Term
friction depends on:
mass of ---------
----- of two surfaces in contact |
|
Definition
|
|
Term
| the ---------------- is a measure of hte strength or kinetic friction between teh two surfaces |
|
Definition
|
|
Term
| it taks a certain amount of force to start an object moving but usually _____ to keep it moving |
|
Definition
|
|
Term
| since friction ----- motion, it ----- the acceleration produced by the forces applied to the object. |
|
Definition
|
|
Term
| reducing friction- fricional forces are ------ but can be reduced |
|
Definition
|
|
Term
| lubricant is a ---- used to reduce friction. what is an example? |
|
Definition
| liquid, adding oil to a car. |
|
|
Term
| magnetic levitation- powerful magnets are used to lift an object so it can ride ona cushion of |
|
Definition
|
|
Term
| does equilibrium mean that no force is acting on the object? |
|
Definition
| no, all forces are balanced |
|
|
Term
| applications of equilibrium- once you identify the force acting on an object, knowing that the net force = _____ helps you solve for the unknown foce. |
|
Definition
|
|
Term
| the foce always act in a ______ to return the spring to its --------- -----/ |
|
Definition
| in a direction, unstretched shape. |
|
|
