Applied Science 10
Motion Unit Questionsfull sentences, completed = A
point form, completed = B
point form, mostly done = C
reduced effort = D or F
1. To tell someone accurately where you are, you must give your location compared to a ___.
2. Identify the point of reference in each of the following statements.
a) I am 10 steps toward the cafeteria from the fish tank.
b) Meet me at MusicWorld.
3. Which statement is more accurate:
a) I walked 50 steps past Tim Horton's. b) I drove 0.5 km up Clark Road from the Irving.
4. a) Your path of footprints across a wet lawn is called the ___.
b) Your first step on the lawn is called the ___.
5. We can always see a moving object's trail, its frame of reference. T, F
6. Would a motionless object have a frame of reference?
7. a) A value that gives just the distance an object moves is called what?
b) A value that gives both the distance and direction an object moves is called what?
8. Which of these are scalars and which are vectors?
a) 4 steps b) 12 m, E c) 0.3 km, W d) 120 cm
9. If you are walk to and fro by the blocks in the foyer, what is your point of reference?
10. State your position relative to the blocks in the following situations.
a) You walk 5 steps W of the blocks.
b) You walk another 10 steps W.
c) Now, you walk 8 steps E.
d) Finally, you walk another 15 steps E.
11. If you change your position from one spot to another, the change is described by what value?
12. In the following situations, state the displacement from the first point to the second point. A number line from math may help with this question.
a) A crow is 25 km W of Saint John and later is 5 km closer to it.
b) You were 2 steps W of the phones and then walked 7 more steps W.
c) A fox is 4 steps W of its den and then walked along until it is 10 steps E of it.
d) A mouse is 12 steps E of a chunk of cheese and later is 20 steps W of it.
e) A mole is 40 steps E of its den and later it is 20 steps E.
13. Why could your steps across the wet lawn be called "time-position" marks?
14. What does an object's average velocity tell about its motion?
15. Find the average velocities of a hippo in the following situations. Use meters and seconds.
a) it moves 14 m in 23 s.
b) it moves 50 m in 10 s.
c) between 10:01 AM and 10:03 AM it walked 150 m. (1 min = 60 s)
d) in 1.5 minutes it walked 90 m.
e) it moves from a spot 3 m E to a spot 55 m E in 1.4 minutes.
f) it moves 0.6 km in 0.4 hr. (1 km = 1000 m, 1 hr = 3600 s)
g) it moves from a spot 20 m W to a spot 80 m E in 2.3 minutes.
16. What two things does a time-position graph tell us about the motion of an object?
17. a) In general, how do we show any positive motion on a t-p graph?
b) If an object finishes its motion in a "westerly" position, where is this on a t-p graph?
18. Sketch time-position graphs to describe the following motions.
a) an object starts at the reference point and moves eastward for a while at a medium speed
b) an object starts at the reference point and moves at a fast westward speed
c) an object starts at the reference point and moves at a slow eastward speed
d) an object starts at the reference point and moves eastward for a while at a medium speed but then
pivots and heads back quickly to the reference point
e) an object starting from the reference point moves westward for a while at a rapid speed but then
pivots and heads slowly back to the reference point but stops a bit short
f) the object never moves from the reference point.
19. Create a time-position "story graph" for the following situation. An object starting from the reference
point moves 10 m E in 5 seconds and then pauses for 3 seconds. It moves another 10 m E in 7 s
before pausing again for 4 seconds. Finally, for 17 seconds, it moves back toward the reference point
but stops 2 m short. Hint: get the total time and distance first to help you choose the proper scale.
20. Look at these two little t-p graphs.
a) Which one makes a
situation seem to change
faster than it really does?
b) And which one makes a
situation seem to change
more slowly than it really does?
21. Before you create a time-position graph,
a) which type of values go on the x axis?
b) what label and unit go with the x axis?
c) which type of values go on the y axis?
d) what label and unit go with the y axis?
e) how do we try to make the two arms similar in length?
22. a) Use this data to plot a t-p graph.
Time (s): 1 2 3 4 5 6 7 8
Distance (m): 4 8 12 16 20 24 28 32
b) Find the slope.