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國小五六年級
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1
In a coordinate system used to describe motion, what is the purpose of the origin?
A
It marks the starting point or reference point for measuring position.
B
It indicates the direction of motion.
C
It represents the speed of the object.
D
It shows the total distance traveled.
2
A UAE Mars mission rover starts at position x = 2 m on a straight track and moves to position x = 8 m. What is its displacement?
A
+6 m
B
-10 m
C
-6 m
D
+10 m
3
A student walks from the library to the cafeteria, a distance of 50 m east, and then returns to the library. Which statement correctly compares distance and displacement?
A
Distance is 100 m, displacement is 100 m east.
B
Distance is 50 m, displacement is 50 m east.
C
Distance is 100 m, displacement is 0 m.
D
Distance is 0 m, displacement is 100 m.
4
On a coordinate axis, if the positive direction is to the right, what does a negative displacement indicate?
A
The object did not move.
B
The object moved to the right.
C
The object moved to the left.
D
The object moved faster.
5
A falcon flies from a position 15 m east of its nest to a position 5 m west of its nest. If east is positive, what is its displacement?
A
-20 m
B
-10 m
C
+10 m
D
+20 m