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A push or pull

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SI unit used to measure force.

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The combo of all forces acting on an object.

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Causes an object to start moving, stop moving, or change direction

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Equal forces acting on one object in opposite directions.

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Like velocity and acceleration, a force is described by its strength and by the direction in which it acts.

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How are unbalanced and balanced forces related to an object's motion?

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How are unbalanced and balanced forces related to an object's motion?

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Unbalanced forces acting on an object result in a net force and course a change in the object's motion. Balanced forces acting on an object don't change the object's motion.

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The force that two surfaces exert on each other when they rub together.

Depends on- how hard the surfaces push together and the types of friction involved.

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Static Friction
Sliding Friction
Rolling Friction
Fluid Friction

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A force that pulls objects toward each other.

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Mass & Weight (factors that affect gravity)

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Mass & Weight (factors that affect gravity)

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Weight- the force of gravity on a person or object at the surface of a planet.
Mass- the measure of the amount of matter in an object.

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When the only force acting on a falling object is gravity.

In free fall, the force of gravity is an unbalanced force, which causes an object to accelerate

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Air Resistance- objects falling through air experience a type of fluid friction.

Terminal Velocity- The greatest velocity a fallin

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Any two objects in the universe, without exception, attract each other.

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An object that is thrown.

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An object at rest will remain at rest, and an object moving t a constant velocity will continue moving at a constant velocity, unless it is acted upon by an unbalanced force.

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Acceleration depends on the object's mass and on the net force acting on the object.

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For every action there is an equal but opposite reaction.

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The tendency of an object to resist change in motion.
Depends on

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Acceleration = net force
divided by mass

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meter per secondd per second (squared)

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A characteristic of moving object that is related to the mass and the velocity of the object

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momentum = mass x velocity

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In the absence of outside forces, the total momentum of objects that interact doesn't chang

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Any object that orbits another object in space

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Any force that causes an object to move in a circular path