Term

Definition
a unit that you get from combining fundamental units 


Term
What are the fundamental units of the MKS system? 

Definition


Term
number of significant digits in 400,000 

Definition


Term
number of signifcant digits in 40.01 

Definition


Term
number of significant digits in .00203 

Definition


Term
number of significant digits in 1.070 

Definition


Term
when you add or subtract exponents, what has to happen? 

Definition
the exponents have to be the same number 


Term
What is the difference between precision and accuracy? 

Definition
precision is the degree of exactness of a measurment whereas accuracy describes how well the results of the meausrement agree with the "real" value 


Term
What are the three major graphical relationships and their equations? 

Definition
directy=kx; inversey=k/x; exponentialy=kx^2 


Term
What is the difference between a scalar and a vector? examples of each. 

Definition
a scalar has magnitude only; a vector has magnitude and direction; scalar example is speed; vector example is velocity 


Term
Vectors are represented by_____. 

Definition


Term
What is the difference in distance and displacement? 

Definition
distance is how far you go with no direction; displacement is how far you are from where you began 


Term
What is the difference in speed and velocity? 

Definition
speed is how fast you are going; velocity is how fast you are going in a particular direction 


Term
What is Galileo's law of falling bodies? 

Definition
all objects fall with the same acceleration (9.8 m/s^2) in the absence of air resistance 


Term
What is the value for "g" on earth? 

Definition


Term
What does the slope of a dt graph represent? 

Definition
velocity; the steeper the slope, the greater the velocity 


Term
What does a flat line on a position time graph mean? 

Definition


Term
What does the slope of a velocity time graph represnet? 

Definition


Term
What does a flat line on a velocity time graph mean? 

Definition
he going at a constant velocity 


Term

Definition
interaction between two objects 


Term
What are the fundamental forces? 

Definition
electromagnetic, gravity, weak nuclear, strong nuclear 


Term

Definition
the law of inertia; an object a rest will remain at rest and an object in motion will remain in motion at a constant speed in a straight line unless acted on by an outside force 


Term

Definition
the law of acceleration; acceleration is directly propotional to net force and inversely proportional to mass 


Term

Definition
to every action, there is an equal and opposite reaction; there are two forces and two objects 


Term

Definition
the ability of an object to remain at rest or stay in motion 


Term
What is the difference in mass and weight? 

Definition
mass is a scalar and it is teh amount of matter or the amount of inertia; weight is the force of gravity, vector, downwards, measured in Newtons. 


Term

Definition
anything that's tossed, thrown, or dropped in a gravitational field 


Term
What component stays constant during the flight of a projectile? 

Definition


Term
What velocity component is affected by the acceleration of gravity? 

Definition


Term
What is the first step in solving a horizontally shot projectile? 

Definition


Term
If an object is thrown horizontally and another object is dropped at the same time, which object will hit first? 

Definition
they will hit at the same time 


Term
What is uniform circular motion? Is an object in uniform cicular motion accelerating? 

Definition
when an object is moving in a circular path at a constant speed; yes because it changes direction 


Term
What causes an object to follow a circular path? What is the equation? 

Definition
centripetal force; Fc=mv^2/r 


Term
What are Kepler's three laws? 

Definition
all planets more about the sun in ellipses; a planet speeds up as it apporaches the sun; the ration of the period squared to the radius cubed is constant 


Term
What is the universal law of gravitation? 

Definition
the force of gravity is directly proportional to the products of the masses and inversely proportional to the distance squared 


Term
Who determined the universal gravitational constant? 

Definition


Term
What is the inverse square law? 

Definition
double the distance, the inverse square is 1/4 


Term
If a person weighed 750 N on earth and went to a planet that was 5 times more massive and twice the radius of Earth, what would he weigh on the planet? 

Definition


Term
What is rotational motion and how is it caused? 

Definition
motion in a circle surrounding an axis; caused by torque 


Term

Definition
rotational effect caused by parallel forces 


Term
How do you calculate torque? 

Definition
T=Fl; l is the torque arm, which is the perpendicular length from the pivot point to the force 


Term
What determines how much rotational inertia something has? 

Definition
the distribution of mass; the big wheel has more rotational inertia than the small wheel 


Term
What is rotational inertia or moment of inertia? 

Definition
when an object starts rotating, it wants to kepp rotating; 


Term
What is the center of mass (gravity) of an object? 

Definition
the point at which you draw your force vector down; where the force of gravity acts 


Term
When will toppling occur? 

Definition
when the center of gravity is not over the base of support 


Term
What are the 2 conditions of equilibrium? 

Definition
translational and rotational; translationalFup=Fdown; rotationalCW torque=CCW torque; both of these conditions must be met to be in equlibrium 


Term

Definition
inertia in motion; determined by mass and velocity 


Term

Definition
the amount of force and the amount of time the force is applied to an object 


Term
What is the law of conservation of momentum? 

Definition
the total momentum in a system remains constant 


Term
What is work? What is the unit of work? 

Definition
a force acting through a distance; joule (newtonmeter) 


Term
What must be true about the force and distance for work to be done? 

Definition
the force must cause motion parallel to the direction of the force for work to be done 


Term
What is power? What is the unit of power? 

Definition
rate of doing work or how fast work is done; Watt 


Term
What is energy? What is the unit of energy? 

Definition
the ability to do work; joule 


Term
HOw do you calculate gravitation poential energy? 

Definition


Term
what happens when forces are balanced? 

Definition
they add up to zero and will not cause a change in motion 


Term
what happens when forces are unbalanced? 

Definition
they will not add to zero and will not cause a change in motion 


Term
hwo do you find the direction after using the pythagorean theorem? 

Definition
inverse tan of opposite over adjacent then write east of south 


Term
Vy component is always ____. 

Definition


Term
What is the universal gravitation constant (G)? 

Definition


Term
what are the first steps in solving a horizontally shot projectile? 

Definition


Term
If the distance between two objects is tripled, then what happens to the gravitational force between them? 

Definition


Term
What happens if the mass of one object is doubled? 

Definition


Term
What is the critical velocity? 

Definition
how fast something must be going to make it around the loop 


Term
What does a flat line on a distance time graph mean? 

Definition


Term
What does a flat line on a velocity time graph mean? 

Definition

