Search
Create
Log in
Sign up
Log in
Sign up
Get ahead with a $300 test prep scholarship
| Enter to win by Tuesday 9/24
Learn more
Science: Physics
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (24)
Inertia
慣性、惰性
Force
A vector quantity.
Kinematics variables
Description of object motion
Mechanics
The the study of motion of objects and the forces that act upon them.
Dynamics
Forces acting on objects
Acceleration (accelerate)
加速度
Velocity
A vector quantity
Displacement/time
Constant Acceleration
Acceleration where velocity changes by a constant amount
EX: 0 m/s² -> 10 m/s² -> 20 m/s² -> 30 m/s²
Free-fall
Being solely under the force of gravity.
This may include air resistance
Statics
Description of objects at rest
Normal Force
A contact force that always exerts itself perpendicular to an object acting on a surface.
Frictional Force
A force that exerts itself parallel and opposite an applied force. It resists applied force in the opposite direction.
Tension Force
Force that results from pulling on a rope.
Contact
Forces that occur as a result of direct physical contact between objects.
Applied Force
Force that results from an object exerting a force over another object.
Free-Body diagram
A simple diagram that shows the objects and forces that act on them and in what direction and at what angle.
Mass
How much matter is in an object. This is static anywhere in the universe. This is measured in kg and is a scalar quantity.
Vacuum
A space in which air has been almost or completely removed entirely.
Rotation
回転（運動）
Long-range
Forces that affect objects without being in direct physical contact with the object. An example would be gravity, magnetic, or electrical forces.
Weight
The force exerted on a mass by gravity. It varies depending on where you are in the universe. This is measured in Newtons and is a vector quantity
Momentum
運動量、推進力
Resistance
抵抗
Gravity
重力
;