If you are asked to determine an object’s speed, what information must you have? a. distance and period of time b. distance and change in position c. period of time and direction d. distance and direction

The correct answer to the question is : A) Distance and period of time.

EXPLANATION:

Before answering this question, first we have to understand speed.

The speed of a body is defined as the rate of change of distance or the distance covered by the body per unit time.

We know that distance is a scalar quantity. So, speed is also a scalar quantity. Hence, it requires only magnitude for its complete specification. No direction is needed.

Hence, distance and period of time is needed to determine speed of  a body.

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c) both a and b.