________: a type of force that opposes the sliding of two surfaces touching each other.
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Inertia
________: The tendency of an object to resist a change in its motion.
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Gravity
________: an attractive force between two objects.
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same direction
An object's momentum is in the ________ as its velocity.
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Sir Issac Newton
________ developed the law of universal gravitation which states all objects are attracted to each other by a gravitational force.
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Weight
________ is the gravitational force exerted on an object; because ________ is force it is measured in newtons.
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Mass
________: matter in an object.
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Velocity
________ is speed in a certain direction.
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Elastic collision
________: when colliding objects bounce off each other.
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contact force
A(n) ________ is a push or pull on one object by another that is touching it.
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Inelastic collision
________: when objects collide and stick together.
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Momentum
________ is a measure of how hard it is to stop a moving object.
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net force
An object will accelerate in the direction of the (unbalanced) ________.
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opposite direction
When an object applies a force on another object, the second object applies a force of the same strength on the first object, but the force is in the ________.
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Arrows
________ can be used to show forces.
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Newtons second law of motion
According to ________, the acceleration of an object is equal to the net force acting on the object divided by the objects mass.
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Friction
________ and inertia cause objects to stop moving.
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Gravity
________ is an attractive force that exists between all objects that have mass (the amount of matter in an object, measured in kilograms .)
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net force
When unbalanced forces act on an object at rest, the object begins moving in the direction of the ________.
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Friction
________ is a force that resists the motion of two surfaces that are touching.
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net force
The combination of all forces acting on an object is the ________.
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Chapter 2 study guide
The laws of motion
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Force
a push or pull
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Contact force
a force that one object exerts on on another object while touching it
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Noncontact force
a force one object can exert on another without touching it
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Gravity
an attractive force between two objects
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Mass
matter in an object
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Weight
the gravitational force exerted on an object
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Friction
a type of force that opposes the sliding of two surfaces touching each other
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Net force
the sum of all forces working on one object
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Balanced force
when the net force acting on an object does not cause a change in its motion
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Unbalanced force
when the net force acting on an object causes the motion of an object to change
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Newton's 1st law of motion
an object will move at a constant velocity until unbalanced force acts on it
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Inertia
The tendency of an object to resist a change in its motion
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Newton's 2nd law of motion
f=ma force = mass x acceleration
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Circular motion
any motion in which an object moves in a curved path
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Centripetal force
a force that is exerted toward the center of a curved path
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Newton's 3rd law of motion
if one object exerts a force on another the second object exerts an equal yet opposite force on the first object
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Force pair
force two objects apply to each other
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Momentum
a measure of how hard it is to stop an moving object
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Law of conservation of Momentum
the total momentum of a group of objects stays the same unless outside forces act on the objects
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Flashcard (132)