Position
What is position?
An object's location
What is motion?
A change in position over time
What is the equation for speed?
S = D/T
What 3 pieces of information are needed in order to solve for acceleration?
final velocity, initial velocity, and time
Describe the position of my desk.
Must have a reference point (door for example), distance away (10 steps for example), and direction (to the right of the door)
What is a vector?
A quantity that has magnitude (size) and direction.
What is the speed of an object that travels 8 meters in 2 seconds?
4 m/s
What are 3 ways an object can accelerate?
Speed up, slow down, change direction.
Object moves from A to B in the shortest path possible.
No, velocity is speed in a given direction. If one car is going 45 miles per hour North and another car is going 45 miles per hour South, they have the same speeds but different velocities since they are not going in the same direction.
How far can a car going 30 miles per hour go in 3 hours?
90 miles
What is the acceleration of a car that takes 0.3 hours to speed up from 30 mi/hr to 60 mi/hr?
A = (60-30)/0.3 = 100 mi/hr2
Give an example of a scenario where distance is different than displacement.
Object goes from A to B but not in the shortest path possible.
OR
Object goes from A to B and back to A.
In a distance vs time graph, what does a flat line mean?
In a velocity vs time graph, what does a flat line mean?
Distance vs time graph - object is not moving
Velocity vs time graph - object is at a constant speed (not accelerating)
How long will it take for a car going 70 miles per hour to drive 140 miles?
2 hours
What is the acceleration of a dog that slows down from 5 m/s to 0 m/s in 2 seconds?
A = (0-5)/2 = -2.5 m/s2
Mike's house is 1 mile to the left of the school. The school is 3 miles to the right of the library. Chick-fil-a is 3 miles to the right of the school. If Mike is studying at the library, how far and in what direction does he have to walk to go to Chick-fil-a?
6 miles to the right.
Give an example of relative motion.
Answers will vary.
Two runners are in a 100 meter race. Runner A completes the race in 14 seconds. Runner B runs at a speed of 8 m/s. Which runner won the race and how do you know?
Runner B.
Runner A speed = 100/14 = 7.14 m/s (slower than B)
OR
Runner B Time = 100/ 8 = 12.5 seconds (less time than runner A)
If a bicyclist is accelerating at 1 m/s2, what does this value mean about the change in velocity of the bike?
The bike is increasing its speed by 1 m/s each second. So if the bike is traveling at 2 m/s, after 1 more second, the bike would be at 3 m/s.