Question

The speed of an object at the end of 4 successive seconds is 20.25, 30 and 25 meters per second, respectively. The acceleration of this object is:
A) 2 m/s C) 7 m/s E) 9 m/s B) D) 5 m/s? 8 m/s​

Answer 1

Answer:

The acceleration of the object cannot be determined. Only the average acceleration in each of the three intervals between the four measurements can be determined. The average acceleration over each second in the interval between measurements is 5 m/s per second.

Acceleration could equally be 2 m/s per second for each half second, followed by 8 m/s per second for the next half second.

Explanation:

MARK BRAINLIES

A> OPTION