Your 'cq_1_01.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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First Question:
average velocity = change in displacement/ change in time
= (20cm – 10 cm)/( 9 seconds – 4 seconds)
= 10 cm / 5 seconds
= 2 cm / sec
average velocity = change in position / change in time. Displacement is change in position so
average velocity = displacement/ change in time.
It is not the case that
average velocity = change in displacement/ change in time.
You are steadily improving in your use of definitions. Develop the habit of being completely specific. You're just about there.
Second Question:
(40 cm/sec – 10 cm/sec) / 3 seconds
= 30 cm/sec / 3 seconds
= 10cm / sec
Your units aren't right.
I don't know whether your solution is otherwise correct. Neither of us will be able to make sense of this posting if your answer isn't inserted into a copy of the question. Fortunately that will be easy for you to correct (see below).
Third Question:
d = vt
d = 5 cm / second x 10 seconds
d = 50 cm
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10 minutes
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Please resubmit this assignment and insert your answers at appropriate points into a copy of the question. I did insert one note.