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26 Cards in this Set
- Front
- Back
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velocity
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distance traveled per unit time
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acceleration
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change in velocity per unit time
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free fall
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a change in vertical velocity caused by gravity in which a=9.81 at earths surface
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projectile motion
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motion in two dimensions, each dimension independent of the other
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resultant
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the vector sum of two or more vectors
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net force
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the vector sum or resultant of two or more forces acting on an object
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static equilibrium
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the condition in which an object is at rest because the net force on it is zero
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free body diagram
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a sketch showing all forces acting on an object
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radial acceleration
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the acceleration required to force an object into a circle of motion, which keeps it from moving in a straight line, angular motion, centripetal acceleration
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radial force
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the force exerted on an object to force it into circular motion, centripetal force
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total mechanical energy
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the total KE, PE, and EPE contained within an object or system, TME
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TME conservation law
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if no friction exists within a system, the TME of the system is constant, though individual energies may fluctuate
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impulse
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product of force exerted on a system over a time interval
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perfect elastic collision
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a collision in which objects rebound with no loss of KE; p and KE are conserved
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perfectly inelastic collision
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a collision in which two objects collide and stick; p is conserved, but KE is not
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analogs
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two different variables which appear in 2 different equations of the same form, with each variable matched 1-on-1 by the analogous variable in either equation
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rotational equilibrium
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the condition in which the torques around a rotatable object balance to zero, leading to the object being static (at rest) or rotating at constant angular velocity
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moment of inertia
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the resistance of a rotatable object to changes in rotational motion
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point mass
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an object with so little volume relative to the size of the system, that the object can be considered a point with no significant volume
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angular momentum conservation
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if the torque on a system is zero, then the angular momentum remains constant, though r and v may vary
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gauge pressure
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the difference between the measured pressure and atmospheric pressure
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buoyant force
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the force tending to lift an object immersed in a fluid
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incompressible fluid
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a fluid whose density does not change with pressure; it is not compressible
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capillarity
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the significant rise of a liquid up a thin tube
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terminal velocity
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the ultimate velocity of an object falling through a fluid, terminal speed
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drag force
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the upward force
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