Physical science chapter 11 motion
Terms in this set (38)
An objects change in position relative to a reference point
Frame of reference
A system for specifying the precise location of objects in space and time
Objects move when their position changes in relation to a....
Measures the path taken, how far an object moves
Change of an objects position with a direction indicator
....can be a straight line, but .... Must be a straight line
The distance traveled divided by the time interval during which the motion occurred
Achieved when an object covers equal distance in an equal amount of time (no change in speed)
What axis is time?
What axis is distance?
Calculated as distance divided by time
The speed at a given point in time
Describes both speed and direction
A combination of two velocities
The rate at which velocity changes, an object accelerates is its speed, direction, or both changes
Uniform circular motion
Has centripetal acceleration
Expressed as an increase in meters per second per second
Acceleration can also be a change in....
Velocity vs. time graph
What kind of graph can acceleration be determined by?
The ... Of a line gives the value of acceleration
An action exerted on a body in order to change the body's state of rest or motion
....has a magnitude and direction
-strong nuclear force
-weak nuclear force
What are four fundamental forces?
Contact forces and field forces
Can cause an object to move or stop moving
Push a cart
Example of contact force:
Example of field force:
Objects accelerate in the direction of the....
Do not change motion
Do not cancel completely
A force that opposes motion between two surfaces that are in contact
The force that resist the initiation of sliding motion between two surfaces that are in contact and at rest
The force that opposes the movement of two surfaces that are in contact moving over each other
Sliding friction, rolling friction
Which kinetic frictions are not the same?
What type of friction is air resistance that opposes motion?
Harmful friction can be reduced by the use of...
...friction can be increased
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