Distance and Displacement
If you were sitting on a moving train would the other passengers appear to be moving?
What is no they would appear to be not moving (unless you looked out the window).
What is the SI unit for speed?
What is m/s?
The rate at which velocity changes is called_______.
What is acceleration?
The direction and length of a straight line from point A to point B of a moving object is called___________.
What is displacement?
How many meters are in 1 kilometer?
What is 1,000 meters?
When you add vectors (speed and direction) to find the sum your answer is called the___________________.
What is resultant vector?
A moving object does not __________________if its velocity remains constant.
What is accelerate?
The motion of an object looks different to observers in a different_______________.
What is frame of reference?
Explain what instantaneous speed is.
What is the speed at a particular instant?
The difference between speed and velocity is that velocity includes ____________and speed while speed includes only how fast you're going.
What is direction?
The slope of the curve at a single point on a distance-time graph of acceleration gives what information?
What is instantaneous acceleration?
Distance is a measure of length. What information does displacement give in addition to length?
If a car has traveled 100 km in 2 hours, what was its average speed?
What is 50 km/hour?
Explain how to calculated an object's speed.
You divide the distance it moved by the time it took to move. For example, if the distance is 5 m, and it took 5 s to move that far, 5m divided by 5s = 1 m/s.
The acceleration of a moving object is calculated by dividing the change in__________________ by the time over which the change occurs.
What is velocity or speed?
On a distance-time graph what does the slope represent?
What is speed or velocity?
A river current is flowing at 7 km/h relative to the shore. A boat is moving in the same direction as the river current at 10 km/h. How would you calculate the speed of the boat relative to the shore? What is the speed of the boat relative to the shore?
What is I would add the vectors of the boat and the river current to get a speed of 17 km/h.
I went walking. At 2 minutes into the walk I had traveled 50 meters. At 4 minutes into it I had traveled 100 meters. At 8 minutes into it I had traveled 200 meters. What was my average speed from minute 4 to minute 8?
Average speed = distance divided by time
200 m - 100 m = 100 meters of distance
100 meters divided by 4 minutes = 25 meters per minute.
Imagine that you are walking at a velocity of 2 m/s. You then increase your speed to 5 km/s in a period of 2 seconds. How will you calculate your acceleration? What is your acceleration?
What is acceleration = Vf - Vi divided by time.
5 m/s - 2m/s = 3 m/s divided by 2 seconds = an acceleration of 1.5 m/s
A river current has a velocity of 8 km/h relative to the shore. A swimmer is swimming against the current (upstream) at 1 km/h. How would you calculate the velocity of the swimmer relative to the shore? Why would you calculate it this way? How fast is the swimmer moving relative to the shore?
I would subtract the velocity of the swimmer from the velocity of the river current because they are traveling in opposite directions. The swimmer is moving at 7 km/h relative to the shore.