Home
Subjects
Explanations
Create
Study sets, textbooks, questions
Log in
Sign up
Upgrade to remove ads
Only $35.99/year
physics midterm
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (40)
Order of Magnitude (estimate)
is a value that is an approximation due to the given information. The more detailed the information, the higher the accuracy
Dimensional Analysis
the connection between units and the calculations
Scalar
a numerical value that can be positive or negative
** magnitude
Vector
a quantity with both magnitude and direction
**magnitude and direction
Distance (scalar)
the total length of travel
Displacement (vector)
your change in position
Average speed
the distance traveled divided by the amount of time the motion took
Velocity
the "speed in a given direction"
Instantaneous velocity
the velocity at a given point in time
Acceleration
a change in velocity over time
Uniform motion
when there is equal displacement occurring over equal time intervals
Free fall
- the effect of an object only having the force of gravity on it
- Objects are also affected by air resistance
- Some things fall slower than others
- Nothing is truly in freefall
With no air, everything falls at the same rate
- On most objects, however, air resistance is very small so we can factor it out and treat it like a normal free fall situation
Acceleration due to gravity
near the surface of the earth, all objects experience the same amount (9.8m/s2)
Projectile
Projectile is an object moving in two dimensions under the influence of earth's gravity; it's path is a parabola
Force
a push or pull acting on an object
Newton's first law
- the law of inertia
- Every object stays in a state of rest, or of uniform velocity in a straight line, as long as no net force acts on it
- Inertia is not a force, it is incoherent to an object's mass
- The tendency for an object to maintain its state of rest or uniform velocity in a straight line is called inertia
Inertia
- every object has a resistance to its change in motion
- Moving = staying moving, stopped = staying stopped (w/ no friction)
Newton's Second Law of motion
the acceleration of an object is directly proportional to the net force acting on it, and it's inversely proportional to its mass. The direction of the acceleration is in the direction of the net force acting on an object
Mass
the amount of matter in an object
Universal Mass (kg)
the amount of matter in an object (same no matter where the object is located
Earth Weight (N)
- weight on earth's surface
- Force due to gravity of earth
Eight (N)
is the force of gravity on an object (Fg) changes if gravity is different at different locations
Kinetic Friction
- friction created when objects rub together
Static Friction
- friction on a surface that causes an object to be stuck (Ff) **zipper effect
- stronger than kinetic friction
Air resistance
the force that an object experiences as it moves through air
Tension
the force a rope, wire, or cord, exerts on an object
Always a pull on the object (Ften)
Spring
- the force that a spring exerts on an object
- Stretched it pulls, compressed it pushes (Fspg)
Newton's third law
- whenever one body exerts a force on a second body, the second body exerts an equal and opposite force on the first
- The action force is in the opposite direction of the reaction force
Normal force
the force exerted on an object by a surface (or object) pushing against it (Fn)
Law of inertia
When an object is not moving, the Push and Pull are sharing an equal force on each other, to get something to move the static friction must be broken first
Work
changes the motion or position of an object
Conditions:
- Requires a constant/consistent force
- Displacement must occur
- Force must be in the same direction as the displacement
- Friction cant ever do work, it can only take away energy
Energy
the ability to do work
Potential energy (PE)
stored energy
Kinetic energy (KE)
energy of motion
Springs
- the other PE
- X is the space spring is compressed/stretched
- K is the spring constant
- PE is interchangeable bc joules
Efficiency
- the ratio of work input to work output
- No such thing as something being 100% efficient
- The more parts to a device, the less efficient it is
- Each part will lose energy (mostly to heat)
Inertia
every object has a resistance to its change in motion
Momentum
-an objects mass and velocity or its inertia in motion
- The more mass and the higher the velocity an object has, the greater the momentum
- Momentum before = momentum after
Completely inelastic collision
the one where the objects stick together afterwards, so there is only one final velocity
Completely elastic collision
one where the objects repel afterwards
Sets with similar terms
Physics Semester 1 Exam
59 terms
Rocketry
152 terms
Terms for physics final
60 terms
Physics Final
73 terms
Other sets by this creator
AP Psych People
39 terms
Gov Pol Presidential Nominating System Vocab
14 terms
Psych chapter 14 test
52 terms
chapter 13 psych therapies
53 terms