it is in motion
when an object's distance from another object is changing
System International
basic unit of length
time
speed equals distance divided by
velocity of the object
when you know both the speed and direction of an objects motion, you know the
acceleration
the rate at which velocity changes is called
a car approaching a red light
example of deceleration
time
to determine the acceleration rate of an object you must calculate the change in speed during each unit of velocity
Kilometers per hour per hour
if speed is measured in kilometers per hour and time is measured in hours, the unit of acceleration is hours
average speed
total distance traveled divided by the total time
30 kilometers per hour
As Earth orbits the sun, it is moving
a reference point
a place or object used for comparison to determine if something is in motion is called
International System of Units
used all over the world
The speed of the object
if you know the distance an object has traveled in a certain amount of time you can determine
stay the same for very long
it is rare for any motion to
constant speed
if the speed of an object does not change the object is traveling at a
acceleration
changing direction is an example
15 km/h
if a bicyclist travels 30 kilometers in two hours her average speed is
continuously changin direction
the moon accelerates because it is
the objects velocity did not change
if an object moves in the same direction and AT A constant speed for 4 hours which of the following is true
average speed
if you know a car traveled 300 kilometers in 3 hours you can find its
433 cm
a classroom measures 4.33 meters wide. How wide is the classroom in centimeters
Kilo
one thousand
95 km/ h
a car travels85 km in the first hour of a trip. The car continues to travel for 2 more hours and travels 200 km. What was the average speed of the car for the trip
acceleration formula
initial speed - final speed divided by time