Answer:
the object is decelerating
Elements and compounds
Explanation:
- All pure substances are distinct substances.
- All their parts are the same throughout i.e they are homogeneous.
- They have a definite composition.
- They cannot be easily separated or broken down into simpler substances by physical means.
- They have a unique set of physical properties.
Elements are distinct substances that cannot be split up into simpler ones.
Compounds are substances composed of two or more kinds of atoms joined together in a definite grouping.
Learn more:
Elements in the universe brainly.com/question/4581837
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The average velocity is -4.17 m/s
Explanation:
The average velocity of a body is given by:

where
d is the displacement of the body
t is the time elapsed
For the student in this problem, we have:
Initial position: 
Final position: 
So the displacement is

The time elapsed is
t = 60 s
Therefore, the average velocity is

Where the negative sign means the student is moving towards the origin.
Learn more about average speed and velocity:
brainly.com/question/8893949
brainly.com/question/5063905
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