speed, distance, and time
speed, velocity, and acceleration
definition
multiple choice
pictures
100
What is a reference point used for?
Determining if an object is moving.
100
What is the formula for velocity?
(Final position- Initial position/ Time)
100
What is the definition of motion?
A change in the distance from a reference point.
100
Acceleration is:
1. speeding up
2. slowing down
3. change in direction
4. all of the above
4. all of the above
100
What can be used as a reference point?
The house, tree, street light or, swing set
200
What is difference between displacement and distance?
Distance is the path an object took to get somewhere and displacement is the shortest possible way to get there.
200
Can acceleration be the same number as speed or velocity?
NO!
200
What is the definition of SI?
International system of units.
200
Displacement is:
1. The path an object took to get somewhere
2. The fastest most direct route to get from one place to another
3. The fastest way to get from one place to another to avoid traffic
2. The fastest most direct route to get from one place to another.
200
What is this a picture of? It is a ___? (hint: what does it do?)
A scalar
300
What is the formula used to find speed?
Distance/ Time
300
Time and Distance are used to find____?
Speed
300
What is the definition of speed?
The distance an object travels per unit of time.
300
What information does a vector give?
1. direction and magnitude
2. speed and direction
3. magnitude and time
1. direction and magnitude
300
What does this show?
Displacement is usually faster than distance.
400
If Kelly runs 20 km in 5 seconds, what is her average speed.
4km/s
400
What is the difference between positive velocity and positive acceleration?
Positive velocity means it is moving east/ north and positive acceleration means it is moving faster than it was initially.
400
What is the definition of velocity?
A change in speed or direction.
400
If Gregory starts off 19 feet north of his friend Margarita and then he leaps 14 ft closer to her in two seconds. Will his velocity be:
1. a positive number
2. a negative number
2. a negative number
400
What can we measure here?
velocity
1000
Timothy bikes 97 m/hour, how many hours will it take him to bike 582 m if he takes a 15 minute break after every hour?
7 1/2 hrs. Why?
a. 582/97=6 hours
b. 15(minutes) x 6(hrs)=90 / 1.5 (hours)
c. 6+1.5=7.5 hours
1000
A car started at 0s at 0m/s. It stopped after 15 s it was at -30m/s, in what direction was it moving? and what is it's acceleration?
The car could have been moving south or west. The car has accelerated -2m/s/s
1000
What is acceleration?
A change in velocity NOT position.
1000
The SI uses ____ to meaure distance:
1. feet
2. miles
3. yards
4. meters
4. meters
1000
What does the flat part of the graph show?
The hiker has paused hiking but time is still passing