The speed of an object at the end of 4 successive seconds is 20, 25, 30 and
35 meters per second, respectively. The acceleration of this object is
A. 2 m/s
B. 5 m/s
C. 7 m/s
D. 8 mis
E. 9 m/s
.
Answers
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Answer:
The answer is a option B
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