Resistance of the air (technically a fluid) against the forward movement of an airplane.
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fluid friction
Front
friction that occurs as an object moves through a fluid
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Gravity
Front
A force of attraction between objects that is due to their masses.
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net force
Front
The combination of all forces acting on an object
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non-contact force
Front
a force that one object can apply to another object without touching it
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contact force
Front
a push or pull on one object by another that is touching it
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Momentum
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mass x velocity
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Newton
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SI unit of force
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electric force
Front
the attraction or repulsion between electric charges
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Spring Force
Front
The force exerted by a compressed or stretched spring upon any object that is attached to it
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balanced forces
Front
Equal forces acting on an object in opposite directions
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sliding friction
Front
friction that occurs when one solid surface slides over another
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Applied Force
Front
a force which is applied to an object by a person or another object
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static friction
Front
Friction that acts on objects that are not moving
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Inertia
Front
The tendency of an object to resist a change in motion
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normal force
Front
the force perpendicular to a surface that prevents an object from falling through the surface
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rolling friction
Front
friction that occurs when an object rolls over a surface
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unbalanced forces
Front
Forces that produce a nonzero net force, which changes an object's motion
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Vector
Front
A quantity that has magnitude and direction
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magnetic force
Front
the attraction or repulsion between magnetic poles
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tension
Front
pressure
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Friction
Front
A force that opposes motion between two surfaces that are in contact
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law of conservation of momentum
Front
For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.