Position and Motion
A starting point you choose to describe the location, or position of an object
reference point
What is the measure of the distance an object travels per unit of time
speed
What is acceleration?
A change in velocity
Solve the following equation.
V= 35m/7s
V=5m/s
Solve this equation
a=5m/s-0m/s
-----------
1s
a=5m/s2
What is the changing of position
Motion
What is the difference between constant speed and instantaneous speed
Constant speed is the rate of change of position in which the same distance traveled each second
Instantaneous speed is the speed at a specific instant in time
Explain why the term deccleration is not correct
When an object slows down it is changing its velocity. When a change of velocity happens acceleration is occurring
Solve the following equation
V=150m/2 mins
V=1.25m/s
Solve this equation
a=40-50
________
10s
a=-1m/s2
What is an objects distance and direction from a reference point
position
What is velocity?
The speed and the direction of a moving object
How do we find the acceleration of an object
You subtract the initial speed from the final speed and then divide by total time.
A truck goes 240 meters down the road. It travels for 30 seconds, what is the average speed of the truck?
V=8m/s
A truck goes from a dead stop to 98 m/s in 15 seconds. What is the acceleration of the truck?
a=6.533m/s2
What is the difference between the initial position and the final position of an object
displacement
How do you find the average speed of an object
to find the average speed you divide the total distance traveled over the total time taken
On a oval racetrack where a car is at constant speed the entire time, when does the acceleration of the car change?
The acceleration would change every time the car goes around a turn because this would cause the velocity to change due to the change in direction.
In 15 seconds a rollercoaster goes down a hill that is 175 meters. What is the average speed?
V=11.667m/s
In a span of 3 minutes a car goes from 85m/s to 53 m/s. What is the rate of acceleration?
a=-.1778m/s2
Why is it important to use a reference point to describe position?
By giving a reference point it allows people to look for that point and are able to get to the destination based on the mark thy are looking for
How could you tell if the velocity of something changed?
The velocity changes if the speed or direction changes
What is the unit of measurement for acceleration?
m/s2
In a time of 5 mins. a car goes 278 meters. What is the average speed of the car?
V=.927 m/s
In 7 minutes a plane goes from 25 m/s to 118m/s and finishes at 682 m/s. What is the rate of acceleration?
a=1.56m/s2