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Level 22

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acceleration

(physics) a rate of change of velocity

Acceleration due to gravity

9.8 m/s/s or m/s^2 in the metric system

displacement

A change in position (delta p).

Distance

a path taken and always a positive number

Instantaneous Velocity

How fast an object is moving and direction of motion at each instant in time

kinematics

branch of mechanics that explains the "what" and "how" of motion

Magnitude...

... of a vector is always a positive quantity

non-uniform motion

change in an objects speed or acceleration

Origin

Center of a coordinate system is

Position

Is the distance and direction away from a reference point

projectile

An object in the air that is only subject to the force of gravity and wind resistance after it leaves the ground.

Projectile Motion

2D Motion in which the object moves at a constant velocity in one direction and accelerates in another

range

distance a projectile travels horizontally along the ground

Scalar Quantity

a measure of magnitude

tangent

opposite/adjacent

uniform motion

constant velocity with no change in direction

uniformly accelerated motion

constant increase or decrease in velocity with no change in direction

Vector quantity

9.8m/s per second is a

Velocity

a speed in a particular direction.

vector

a displacement distinguished by magnitude and direction but not by location.

at rest

not moving

frame of reference

assists one in physics in which one chooses a place (point) a measure it against changes in position.

earth-based frame of reference

we typically describe motion from the vantage point of the stationary observer on the __

Speed

Units: cm/s, m/s, mi/hr, km/s ...

constant velocity

An object that has the same average velocity for all time intervals is moving at _______

Reference Point

A _______ is a place or object used for comparison to determine if something is in motion.

direction

A point toward something, determined by its orientation and sense.

Time Interval

difference between clock readings

Average Speed

Distance traveled divided by the time required to cover the distance

Average Velocity

Dividing displacement by elapsed time

anthropometry

the scientific study of the measurements and proportions of the human body

biomechanics

the study of the structure and functions of living organisms

Dynamics

A branch of physics that focuses on force and how they relate to motion.

ergonomics

study of efficiency in working environments

formal problem

requires working towards a goal and needs actual info to answer. A process is then followed to answer question

informal problem

an open-ended problem that has a subjective opinion for the answer and there is no single right answer

formal question (has a goal, and a process can then be followed to complete goal)

what kind of question is "how high do I need to toss the ball to get in into the hoop?"

what kind of question is "What should I do tomorrow?"

informal question (open-ended, subjective opinion answer, no single right answer)

kinesiology

study of the mechanics of the body

kinetics

concerned with measuring and studying the rates of reactions

mechanics

branch of applied mathematics dealing with motion and the forces producing motion

Qualitative

A description done solely in words.

quantitative

a discription given in numbers

translation

linear movement

curvilinear motion

movement along a curved path

rectilinear motion

movement along a straight line or path

velocity, displacement, acceleration

name 3 vector quantities associated with this course

speed, distance

name 2 scalar quantities associated with this course

up and right

what directions indicate positive movement

down and left

what directions indicate negative movement

trajectory

Path of a projectile

apex

the highest point in the trajectory of a projectile

numbers

scalar quantities are expressed by

numbers and signs

vector quantities are expressed by

scalar

a physical quantity that has magnitude but no direction

gravity

(physics) the force of attraction between all masses in the universe

vertical

gravity only affects _______ components of acceleration

air resistance

Fluid friction acting on an object moving through the air.

horizontal

the _______ does not affect the vertical motion

-9.81m/s2

what is the vertical acceleration of a projectile always equal to

0m/s2

what is the horizontal acceleration of a projectile always equal to

does not change

the horizontal velocity of a projectile _______

the apex

where is the vertical velocity of a projectile equal to 0

the same

if take off and landing heights of a trajectory of a projectile are the same, then the time from ground to apex should be _______ the time from apex to ground

name the factors affecting projectile motion

projection speed, projection angle, relative projection height

projection speed

which factor of projectile motion can you control

the take off and landing heights are equal

for the range release angle theory, the optimal angle is 45 degrees if....

the landing height is higher than the take off height

for the range release angle theory, the optimal angle is greater than 45 degrees if...

the landing height is lower than the take off height

for the range release angle theory, the optimal angle is less than 45 degrees if...

free fall

a state in which an object is gravitationally drawn to the earth's surface and is unaffected by any forces besides weight

Terminal Velocity

Greatest velocity an object can reach is called _______.

no

Is there hyperconjugative stabilization of the methyl carbocation

numbers and direction

vector quantities are expressed in _______

0 m/s

vertical velocity at the peak is

the take off and landing height are equal

if the take of and landing heights are the same...

vertical trajectory

if the projection angle is 90 degrees it is a _______

oblique trajectory

if projection angle is in between 0 and 90 degrees it is a _______

horizontal trajectory

if the projection angle is in 0 degrees it is a _______

not equal

in general projections the take off and landing heights are _______

equal

Law of Reflection: Angle of incidence is LESS/EQUAL/GREATER than the Angle of reflection

they would both hit the ground at the same time

If gravity is the only external force present, would a bullet fired horizontally from a gun or another bullet dropped from the same height hit the ground first?

a change in velocity

dynamic motion is characterized by...

anthropometry is _______

the science of measurement of body size