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27 Cards in this Set
- Front
- Back
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Force |
a push or pull on an object |
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Contact Force |
a push or pull on an object by another object that is touching it |
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Non-contact Force |
a force that one object applies to another without touching it |
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Balanced Forces |
forces acting on an object that combine and form a net force of zero |
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Unbalanced Forces |
forces acting on an object that combine and form a net force that is not zero |
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Gravity |
an attractive force that exists between all objects that have mass |
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Mass |
the amount of matter in an object |
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Weight |
the gravitational force exerted on an object |
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Friction |
a contact force that resists the sliding motion of two surfaces that are touching |
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Net Force |
the combination of all the forces acting on an object |
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Inertia |
the tendency of an object to resist a change in its motion |
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Circular Motion |
any motion in which an object is moving along a curved path |
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Centripetal Force |
in circular motion, a force that acts perpendicular to the direction of motion, toward the center of the curve |
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Force Pair |
the forces two objects apply to each other |
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Momentum |
a measure of how hard it is to stop a moving object |
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Law of Conservation Of Momentum |
a principle stating that the total momentum of a group of objects stays the same unless outside forces act on the objects |
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Newton's 1st Law |
states that an object in motion will stay in motion/an object at rest will stay at rest unless acted upon by an outer force |
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Newton's 2nd Law |
states that the greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object) |
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Newton's 3rd Law |
states that for every action, there is an equal and opposite reaction |
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Start, stop, speed up, slow down, change direction |
What are 5 different ways can change motion? |
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Static, sliding, rolling, and fluid. |
What are 4 types of friction? |
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Small bumps; force. |
What causes friction and what does it depend on? |
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For driving or walking |
Why is friction a necessary force? |
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The more mass a body has, the stronger will be its own gravitational force |
What effect do mass and distance have on gravity? |
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The more mass an object has, the more inertia it has |
What effect does mass have on inertia? |
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F = m*a |
Force = mass * acceleration |
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a = vi - vf/t^2 or a = f/d |
Acceleration = vi - vf/time^2 or Acceleration = force/distance |
