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vocab
position and motion
Speed and Velocity
acceleration
math skills
100
difference between initial position and final position of an object.
What is displacement?
100
a change in position relative to a reference point.
What is motion?
100
The difference in speed and velocity is ______.
Speed is distance over a certain amount of time, and velocity is speed and direction of the motion.
100
a speed/time graph with a horizontal line at the 4 on the y axis represents __________
What is constant speed?
100
A train traveled 350 km in 2.5 k. What was the average speed of the train?
What is 140 km/h?
200
object's distance and direction from a reference point.
What is position?
200
When an object is in motion, its distance and direction from the __________ changes.
What is reference point?
200
v= d/t is the formula for _______
What is average speed?
200
a horizontal line on a speed/time graph at 0 on the y axis represents ________.
What is an object at rest?
200
It takes James 50s in his bike to reach his friend's house 250m away. What is his average speed?
What is 5m/s?
300
speed at a specific instant in time.
What is instantaneous speed?
300
To describe a position in more than one dimension, you must use more than one ________.
What is reference direction?
300
There are five steps to follow when calculating average speed from a distance/time graph. They are ____________.
1. Choose a point of the graph 2. Choose another point on the graph 3. Find the difference in time 4. Find the difference in distance 5. v= d/t
300
If a car is speeding up, the velocity arrow will be pointing forward and the acceleration arrow will be pointing _________.
forward, as well.
300
After 2 s Isabela was riding her bike at 3m/s. After 5 s she was moving at 5.4 m/s. What was her average acceleration?
What is .8 m/s^2?
400
speed and direction of a moving object
What is velocity?
400
Position must be described using these three terms.
What is reference point, reference direction, distance.
400
km/h is a unit of measurement for measuring _____.
What is speed?
400
Which way does an object accelerate when going around a curve?
The object accelerates in toward the curve.
400
After 3 s Molly was running at 1.2 m/s on a straight path. After 7 s, She was running at 2m/s. What was her average acceleration?
What is .2 m/s^2?
500
measure of the change in velocity during a period of time
What is acceleration?
500
If you walk 2 km from your house to a store and back home, your displacement is ____
What is "0?"
500
A straight diagonal line in a distance time graph represents ___________.
What is constant speed?
500
a change in velocity during a time interval divided by the time interval during which the velocity changes.
What is average acceleration?
500
The speed of a car traveling on a straight road increases from 63 m/s to 75 m/s in 4.2 sec. What in the car's average acceleration?
What is 2.9 m/s^2?