Definitions
What is Speed?
A measure of the distance an object travels per unit of time.
You can calculate speed by dividing the distance traveled by the time it takes to go that distance.
True
What is Motion?
How much time does it take a bird flying at a speed of 45 km per hour to travel a distance of 1,800 km?
t=d/s so that means
t=1800/45 which equals 40 hours
How does an object accelerate?
It accelerates when it's speed or direction changes.
What is position?
An objects distance and direction from a reference point.
Graphs that compare distance and time are called speed graphs.
False, they are called distance-time graphs.
What is velocity?
The speed and the direction of a moving object.
A cyclist covers a distance of 12 km at a speed of 8 km per hour. Calculate the time taken to cover this distance.
Speed = 8 km/hour
Distance covered = 12 km
T= d/s which is T=12/8 equals 1.5 hours
Distance Traveled/Total Time
Average Speed
What is Displacement?
The difference between the initial position and the final position of an object.
You can use distance time graphs to calculate the average speed of an object.
True
What is a Reference Point?
A starting point you choose to describe the location, or position, of an object.
A complete description of your position includes a..
Distance, a Direction, and a reference point.
The reference direction is the...
Positive (+) direction
What is acceleration?
Acceleration is a measure of the change in velocity during a period of time.
When velocity increases acceleration and velocity are in opposite directions.
False, it is when velocity decreases.
What is average speed?
The total distance traveled divided by the total time taken to travel that distance.
Bob rides his bicycle that is 75 km to get to his house that is east of the bike path. If it takes him 15 hours, what is his velocity?
s= d/t so 75/15= 5 km/hr East.
Negative (-) direction
What is Constant Speed?
The rate of change of position in which the same distance is traveled each second.
A vertical line on a distance-time graph indicates that the motion has stopped.
False, a horizontal line indicates that motion has stopped.
What is the formula to find the time if you are given the distance and the speed?
Time = Distance รท Speed
What can you do to calculate acceleration?
What is the velocity of a rocket that goes 700 km north in 25 seconds?
20 km/sec north