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Sci: Vocabs Chap.2

Chapter 2 Vocabularies

TermDefinition
Force A push or pull on an object.
Contact force A push or a pull on one object by another that is touching it.
Non contact force A force that one object can apply to another object without touching it.
Gravity An attractive force that exists between all objects that have mass.
Mass The amount of matter in an object.
Weight The gravitational force exerted on an object.
Friction A force that resists the motion of two surface that are touching.
Net force The combination of all the forces acting on an object.
Balanced forces Forces acting on an object that combine and form a net force of zero.
Unbalanced forces Forces acting on an object that combine and form a net force that is not zero.
Newton's first law motion If the net force on an object is zero, the motion of the object does not change.
Inertia The tendency of an object to resist a change in its motion.
Newton's second law of motion The acceleration of an object is equal to the net force acting on the object divided by the object's mass
Circular motion Any motion in which an object is moving along a curved path
Centripetal force A force that acts perpendicular to the direction of motion, toward the center of the curve.
Newton's third law of motion When one objects exerts a force on a second object, the second object exerts and equal force in the opposite direction on the first object.
Force pair The forces two objects apply to each other.
Momentum A measure of how hard it is to stop a moving object.
Law of conservation of momentum The total momentum of a group of objects stays the same unless outside forces act on the objects.
Created by: s2007101
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