[3.1 Quiz Q1] Which describes the positions on a horizontal number line?
All points to the left of one are positive.
Which could best describe the motion of an object?
You can describe the motion of an object by
its position, speed, direction, and acceleration
. An object is moving if its position relative to a fixed point is changing. Even things that appear to be at rest move.
Which does a reference point provide quizlet?
The state in which one object’s distance from another is changing
. A place or object used for comparison to determine if an object is in motion. You just studied 8 terms!
What is most often given a value of zero to describe an objects position on a straight line quizlet?
Reference point
is most often given a value of zero to describe an object’s position on a straight line. Positive or negative is assigned to either the right or left of 0 and then the object’s current position or displacement calculated accordingly. Hope it helps u.
What will Julie use the mark for initially quizlet?
She places a single mark on the sidewalk next to the snail. What will Julie use the mark for initially?
Two cars started at the same position and were driven through a city using different streets.
What is the scientific name for a change in velocity?
Acceleration
: The rate of change of velocity is acceleration.
What is the change in position of an object called?
This change in position is known as
displacement
. The word displacement implies that an object has moved, or has been displaced. Displacement is defined to be the change in position of an object.
What is an example of a reference direction?
The direction
is to the left
, and the reference point is your friend. In the second example, the distance is two houses. The direction is north, and the reference point is your school.
What is the purpose of reference point?
A reference point is a place or object
used for comparison to determine if something is in motion
. An object is in motion if it changes position relative to a reference point.
What is a reference point what is a reference direction Why are they important in describing position?
A reference point is a starting point used to describe the position of an object. What is reference direction? The reference direction is
the direction you must travel from the reference point toward an object
. You just studied 15 terms!
Which best describes the position on a horizontal number line?
[3.1 Quiz Q1] Which describes the positions on a horizontal number line?
All points to the left of one are positive. All points to the right of one are positive. All points to the left of zero are negative.
How is speed calculated quizlet?
To calculate the speed of an object divide the distance the object travels by the amount of time it takes to travel the distance. Can be written as
speed=distance/time (s=d/t )
. The speed equation consists of a unit of distance divided by a unit of time. You just studied 27 terms!
Which explains the information needed to calculate speed and velocity quizlet?
Which explains the information needed to calculate speed and velocity?
Both require time
, but velocity requires displacement and speed requires distance. Lila is a track and field athlete. She has to complete four laps around the track, which is 400 meters.
What will Julie use to mark for initially?
“
Acting as a reference point for detecting motion
” Julie wants to know if the snail moves throughout the day so she places a mark next to the snail which will determine if the snail moved from that spot.
Which example best represents balanced forces?
The correct answer is “
an elevator stopped on the third floor”
. Explanation: Balanced forces are those in which forces of action and reaction are produced on a body, canceling each other out and preventing this body from changing its speed.
Which does a reference point provide a position?
A reference point provides a position
from which to measure future distance
. This is possible because to measure a distance we must have a reference point at which to take the measurement. In general, any point in space takes as reference the origin of coordinates.
