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20 Cards in this Set
- Front
- Back
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force
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push or a pull
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gravitational force
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an attractive force that exists between all objects
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electromagnetic force
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one of the fundamental forces due o electric charges, both static and moving
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strong nuclear force
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force of very short range that holds neutrons and protons in nucleus together
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weak force
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a form of electromagnetic force involved in the radiocative decay of some nuclei.
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Newton first law
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states that an onject with no force acting on it moves with constant velocity
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Newton's second law
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the acceleration of a body is directly proportional to the mass
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Newton's third law
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When one onject exerts a force on a second object, the second exerts a force on the force that is equal in magnitude but opposite in direction
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action reaction forces
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pair of forces involved in an interaction that are equal in magnitude and pposite in direction
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weight
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force of gravity on an object
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inertial mass
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ratio of net force exerted on an object to its acceleration
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friction
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the force that opposes the motion between two surfaces that are in contact
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static friction
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the force that opposes the start of motion
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sliding friction
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the force between surfaces in relative motion
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coefficient of friction
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mu, a constat that depends on the two surfaces in contact
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terminal velocity
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velocity of falling object reached when force of air resistance equals weight
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What is the difference between kinematics and dynamics?
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kinematics- study of how objects move
dynamics- the study of why objects move |
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What is the difference between mass and weight?
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weight depends on acceleration due to gravity
- mass never changes |
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what is the main unit of force?
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Newton
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What is a Newton?
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1kg/m/squared
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