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# Physics Vocab 2012

### 20 words

Acceleration The rate at which the velocity of an object changes. (M/s^2)
Displacement A change in position having both magnitude and direction; is equal to the final position minus the initial position. (m)
Force A push or pull exerted on an object that causes a change in motion; has both direction and magnitude and may be a contact or a field force. (Newtons N)
Impulse The prod uct of the average net force on an object and the time interval over which the force acts. (N*s)
Inertia The tendancy of an object to resist change.
Kinectic Energy The energy of an object resulting from its motion. (Joules J)
Momentum The product of the objects mass and the objects velocity. (Kg m/s)
Newtons 1st Law of Motion States that an object at rest will remain at rest, and moving object will continue moving in a straight line with constant speed, if and only if the net force acting on that object is zero.
Newtons 2nd Law of Motion States that the acceleration of an object is proportional to the net force and inversly proportional to the mass of the object being accelerated.
Normal force The perpendicular contact force exerted by surface of another object.
Power The work done, divided by the time needed to do work. (Watts)
Scalar Quantities such as temperature and distance, that are just numbers without any direction.
Tension The specific name for the force exerted by the rope or a string. (Newtons)
Vector Quantities such as positions that have both magnitude and direction
Work The transfer of energy by mechanical means is done when a constant force is exerted on an object in the direction of motion, times the objects displacement.
Potential Energy Stored energy in a system
Mass Amount of matter in an object
Created by: hannahgrace