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chapter 3
Question | Answer |
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Newtons 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 the mass. |
friction | force that opposes the sliding motion between two touching surfaces. |
static friction | frictional force that prevents two surfaces from sliding past each other. |
sliding friction | frictional force that opposes the motion of two surfaces sliding past each other . |
air resistence | force that oppoes the motion of objects that moeve through the air. |
gravity | attractive force between two objects that depends on the masses of the objects and the distance between them |
weight | gravitational force exerted on an object |
centripetal acceleration | acceleration of an object toward the center of a curved path . |
centripetal force | a net force that is directed toward the center of a curved or circular path . |
Newtons third law of motion | states that when one object exerts a force on a second object the second object exertes a force on the first object that is equal in strenght and in the opposite direction |
momentum | property of a moving object that equals its mass times its velocity |