An object moves if there is force that is exerted on it.
17. reference point
A reference point is any stationary object that can be used to describe the. change of position of the object.
18. Motion
Motion is a change in position of an object with respect to a reference point.
19-20. Meter or meter?
The SI Unit of distance is METRE (symbol: m). “Metre” is the British spelling of the unit of length equal to 100 cm, and “meter” is the American spelling of the same unit.
21-22. Second or sec (s)?
The base unit for time is the second. The second can be abbreviated as s or sec.
III.
23. 5m p/s
The delivery man has a speed of 5m p/s
The delivery man travels in 100 m in 20 seconds; the rate of speed is 100 m divided by 20 sec; 5 m per sec.
Answers & Comments
Meow~
II.
Answer:
16. Force
17. reference point
18. Motion
19-20. Meter or meter?
21-22. Second or sec (s)?
III.
23. 5m p/s
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