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17 Cards in this Set
- Front
- Back
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weight
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the force of gravity acting on an object
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free fall
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the movement of an object toward earth because gravity.
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static friction
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a friction force that acts on an objects that are not moving.
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rolling friction
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a friction force that acts on rolling objects, caused by the change in shape at the point of rolling contact.
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sliding friction
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a friction force that opposes the motion of an object as it slides over a surface `
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fluid friction
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a friction force that opposes the motion of an object through a fluid
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newton
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SI unit of force;equal to the force that causes a 1 kilogram mass to accelerate at a rate of 1 meter per second squared (1kg*m/s^2)
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newton 1st law
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if something is not moving it will not start moving by its self, and it will not stop unless so something pushes against it. (law of inertia)
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Newtons second law
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hing move further and faster when pushed harder. these objects always move in one direction they are pushed unless something changes that direction
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newton's 3rd law
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when a object is pushed in one direction.there i always a resistance of the same size in a opposite direction.
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net force
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the overall force acting on a object after all the forces are combined.
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air resistance
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fluid friction acting on a object moving throw the air
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terminal velocity
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the constant velocity of a falling object when the force of air resistance equals the force of gravity
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inertia
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the tendency of an object to resist a change in its motion
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balanced force
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no change int he object position, net force is zero.
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unbalanced forces
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the net force that will cause a change in the objects direction.
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force
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a push or pull
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