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19 Cards in this Set
- Front
- Back
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Force |
a push or pull on an object |
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Contact Force |
is a push or pull on one object by another one touching it |
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Noncontact force |
a force that can apply force with out touching it |
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Gravity |
is an attractive force that exists between all objects that have mass |
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Mass |
is the amount of matter in an object |
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Weight |
is the gravitational force extered on an object |
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Friction |
is a force that resists the motion of two surface that are touching |
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Net force |
the combination of all the forces acting on an object |
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Balanced forces |
forces acting on an object that combine and form net force of zero |
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Unbalanced Forces |
forces acting on object that combine and form a net force that is not zero |
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Newtons first law of motion |
if the net force on an object is zero the motion of the object does not change An object in motion stays in motion an object in rest stays in rest |
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Inertia |
the tendency of an object to resit a change in its motion |
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Newtons second law of motion |
the acceleration of an objects is equal to the net force acting on the object divided by the objects mass |
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Circular motion |
is any motion in which an object is moving along a curved path |
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Centripical force |
a force that acts perpendicualr to the direction of motion , toward the center of the curve |
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Newtons third law of motion |
when one object exerts a force on a second object , the second object exerts an equal force in the opposite direction on the first object |
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Force Pair |
is the forces two objects apply to each other |
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Momnetum |
is a measure of how hard it is to stop a 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 |
