Size of Earth is small than the size of Jupiter.
We have that the speed of the object between 60 to 70 seconds

From the question we are told
The speed of the object between 60 to 70 seconds
Generally the equation for Average speed is mathematically given as

Where

Therefore

In conclusion
The speed of the object between 60 to 70 seconds

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Static friction because the rocks arent moving are they?
The answer is obviously a because a rubber band uses elastic energy
Answer:
The average speed is 1 m/s
The average velocity is 0
Explanation:
Given;
length of the pool, L = 50 m
time taken for the motion, t = 100 s
The total distance = 50 m + 50 m
The total distance = 100 m
The average speed = total distance / total time
= 100 / 100
= 1 m/s
The average velocity = change in displacement / change in time
change in displacement = 50 m - 50 m = 0
The average velocity = 0 / 100
The average velocity = 0