Motion Chapter 1
Terms in this set (15)
place or object used for comparison to determine if an object is in motion
an object's change in position over time when compared to a reference point
rate at which an object moves. Distance traveled divided by the time taken to travel that distance. S=D/T
Speed in one particular direction. V=D/T
Change in velocity divided by the time it takes for the change to occur. Can be speeding up, slowing down, or changing direction.
A push or pull exerted on an object. Forces have both magnitude (size) and direction. Measured in Newtons.
unit of measure for force (or weight). One newton (N) is equal to one Kg X one meter/second/second.
the sum of all forces acting on an object.
When the net forces on an object equal zero. No motion occurs.
When the net forces on an object are NOT zero. Unbalanced forces cause an object to accelerate (speed up, slow down, or change direction).
a force that opposes motion between two surfaces that are touching. Types of friction include static, sliding, rolling, and fluid.
force of attraction between all objects. The amount of that force depends on the masses of the objects and the distance between them.
The amount of matter in an object.
The measure of the gravitational force on an object. Calculated by the mass x acceleration rate due to gravity.
A fluid used to reduce friction by creating a thin layer between microscopic "hills and valleys" of a surface.