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Physics Midterms
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Gravity
Key Concepts:
Terms in this set (72)
vector in space
specified in a three-dimensional coordinate system with the x-, y-, and z-axes mutually perpendicular to each other
vector
vector sum of its components
unit vector
dimensionless vector with a magnitude of 1
Fortunato Sevilla III, PhD
fondly called as "Doc Sev" at UST; conferred the title of Academician by the NAST in July 2015; specializes in sensors and low-cost instrumentation
New Horizons
first spacecraft designed to explore Pluto, launched last January 19, 2006
Clyde Tombaugh
astronomer who discovered Pluto in 1930
Traction
pulling force applied to the bones intended to reduce or immobilize fractures, reduce muscle spasms, and correct or prevent deformities
Hamilton-Russell traction system
traction system used for fractured femurs
3D printing
process of making 3-D solid objects based on a digital file
motion
so much a part of our daily life
driver error
one of the leading causes of vehicular accidents
Kinematics
describes motion in terms of displacement, velocity and acceleration
Dynamics
study of force in relation to motion
Translation
term used on Physics for motion in a straight line
Position
location of an object with respect to a reference point or origin
Displacement
straight-line distance between an object's initial and final positions, with direction toward the final position
Distance
total length of path taken by an object in moving from its initial to final position
speed
distance traveled by a body in a given time
velocity
time rate of change of position
average speed
total distance traveled divided by the total time elapsed
instantaneous speed
speed at a particular moment in time
average velocity
displacement divided by the total time elapsed
instantaneous velocity
velocity at a specific instant of time
instantaneous velocity
equal to the instantaneous displacement over time
relative velocity
velocity of a moving body viewed at two different frames of reference which may be equal or not
Ivan A. Getting
American astrophysicist; invented Global Positioning System (GPS)
acceleration
rate of change of velocity
instantaneous acceleration
equal to the instantaneous rate of change of velocity with time
tailgating
practice of driving too closely behind another vehicle
free fall
idealized motion of a falling object which is acted upon only by the force of gravity and no other external net forces
time symmetry
time required for the object to reach its maximum height equals the time for it to return to its starting point
speed symmetry
any displacement above the point of release, the speed of the body during the upward trip equals the speed during the downward trip
Solar Impulse 2
tagged as zero fuel aircraft and the "airplane of perpetual endurance"
Bertrand Piccard
initiator of the Solar Impulse project
impact acceleration
acceleration that lasts for a short duration, usually one second or less
sustained acceleration
normally lasts for longer duration
Positive g stress
acceleration from head to foot
Negative g stress
acceleration from foot to head
transverse acceleration stress
direction of acceleration is sideways relative to the body's long axis
John Stapp
studied the effects of acceleration on the human body
multidimensional motion
can be analyzed by resolving it into its components
projectile
object that is thrown horizontally or at some angle with respect to the horizontal
projectile motion
combination of uniform horizontal motion and free fall
trajectory
curved path of a projectile
range
horizontal displacement traveled by the projectile between the launching position and landing position
tangential velocity
velocity of a body moving in a circular path with radius of curvature at any instant
uniform circular motion
circular motion where the speed (magnitude of velocity) is constant
nonuniform circular motion
circular motion where the speed (magnitude of velocity) varies
tangential accceleration
component tangent to the circular path
centripetal acceleration
component directed toward the center of the circle
James Naismith
invented basketball
slope of a line
number that measures line's "steepness"
average velocity
slope of a line of a position-time graph
tangent technique
getting slopes at various times
tangent
straight line that touches the curve at a single point and does not cross the curve at that point
velocity-time graph
can give information on displacement, velocity and acceleration
velocity-time graph
used to determine displacement for a particular time
acceleration-time graph
the change in velocity for a particular time interval
negative slope
means that the velocity or acceleration is directed to.the left of the origin
uniform motion
constant velocity and zero acceleration
kinematics
plays an important role in making the games more lifelike and realistic
Leonardo S. Sarao
Sarao Motors founder
robocar
capable of sensing its environment and navigating without human input
force
push or pull exerted by an object or another
contact force
force between two bodies that are in direct contact
noncontact force
force that acts even if the interacting bodies are separated by distance
gravitational force
attractive force exerted by objects with mass
electromagnetic force
force that holds atoms and molecules together
strong nuclear force
force between protons and neutrons
weak nuclear force
plays a role in the radioactive decay of some nuclei
inertia
property of a body that tends to resist change in its state of motion
acceleration of a body
directly proportional to the net force acting upon it
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