What is a reference point used for?
Determining if an object is moving.
What is the formula for velocity?
(Final position- Initial position/ Time)
What is the definition of motion?
A change in the distance from a reference point.
Acceleration is:
1. speeding up
2. slowing down
3. change in direction
4. all of the above
4. all of the above
What can be used as a reference point?
The house, tree, street light or, swing set
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.
Can acceleration be the same number as speed or velocity?
NO!
What is the definition of SI?
International system of units.
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.
What is this a picture of? It is a ___? (hint: what does it do?)
A scalar
What is the formula used to find speed?
Distance/ Time
Time and Distance are used to find____?
Speed
What is the definition of speed?
The distance an object travels per unit of time.
What information does a vector give?
1. direction and magnitude
2. speed and direction
3. magnitude and time
1. direction and magnitude
What does this show?
Displacement is usually faster than distance.
If Kelly runs 20 km in 5 seconds, what is her average speed.
4km/s
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.
What is the definition of velocity?
A change in speed or direction.
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
What can we measure here?
velocity
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
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
What is acceleration?
A change in velocity NOT position.
The SI uses ____ to meaure distance:
1. feet
2. miles
3. yards
4. meters
4. meters
What does the flat part of the graph show?
The hiker has paused hiking but time is still passing