Answer:
A object in rest is an object that is not moving or a object that is not moving. A object in motion is a object that is in motion or moving.
To find instantaneous velocity given a position vs. time graph is find the derivative at that given point. In other words, find the slope at that point.
So at t = 1s, the velocity is 5/2 m/s.
Hope this helps!
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Sorry that this is a bit late but.... it is
( The spring Scale reads 22 Newton’s when a object is fully submerged in water.)
Answer:

Explanation:
The tension in a cable is given by:

Where
is the mass density of the cable and v is the speed of the cable's pulse. These values are defined as:

The pulse makes four trips down and back along the cable, so 

Replacing (2) and (3) in (1), we calculate the tension in the cable:
