force Flashcards
net force
sum of all the forces that are acting on an object
force
push or pull exerted on a object
friction
force that opposes the sliding motion between two touching surfaces
gravity
attractive force between two objects that depends on the masses of the objects and distance between them
field
region of space in which every point has a physical quantity such as force
weight
gravitational force exerted on an object
Newton’s first law of motion
an object moving at a constant velocity keeps moving at that velocity unles an unbalanced force acts on it
inertia
tendency of an object to resist any change in its motion
Newton’s second law of motion
states that the acceleration of an object is in the same direction as the net force on. the object,and that the acceleration equals the net force divided by its mass
Newton’s third law
states that when one object exerts a force on a second object , the second object exerts a force on the first object that is equal in strength and in opposite direction
air resistance
force that opposes the motion of objects that move through the air
terminal velocity
the maximum speed an object will reach when falling through a substance such as air
free fall
fall of an object on which only the force of gravity is acting
centripetal force
force that is directed toward the center of a curved force or circular force
law of conservation of momentum
states that if no external forces act on a group of their objects, their total momentum does not change
