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KOTELPHYSMOD3VOCAB
PHYSICAL SCIENCE MODULE 3 VOCABULARY
Question | Answer |
---|---|
a push or a pull | force |
the sum of all forces acting on an object | net force |
the force that opposes the sliding motion of two surfaces that are touching each other | friction |
prevents to objects from sliding past one another and is due to the microwelds that form between the two objects | static friction |
opposes the motion of two objects that are sliding past one another and is due to the microwelds constantly breaking and forming as the objects move | sliding friction |
static friction acting over an area where wheels and a surface are in contact | rolling friction |
attractive force between any two objects that depends on their masses and the distance between them | gravity |
a region of space that has a physical quantity at every point | field |
gravitational force exerted on an object | weight |
an object moves at a constant velocity until an unbalanced force acts upon it | Newton's 1st Law of Motion |
the tendency of an object to resist any change in its motion | inertia |
an object's acceleration is in the same direction as the net force on the object and is equal to the net force exerted on it divided by the mass | Newton's 2nd Law of Motion |
when an object exerts a force on a second object , the second object exerts a force on the first object that is equal in strength and opposite in direction | Newton's 3rd Law of Motion |
friction-like force that opposes the motion of objects that move through air | air resistance |
the maximum speed that an object will reach when falling though a substance, such as air | terminal velocity |
state of an object when the only thing acting on it is gravity | free fall |
force exerted toward the center of a curved path | centripetal force |
if no external forces act on a group of objects, then their total momentum does not change | law of conservation of momentum |
unit of force equal to 1 kg x m/s^2 | Newton |