Question

Which information is necessary to determine an object's speed?

1. distance and period of time.
2. distance and direction
3. period of time and direction
4. distance and change in position

Answer 1

Answer:

1. distance and period of time.

Explanation:

The speed is calculated using the formula $k = \frac{d}{t}$

"k" is the speed, "d" is the distance and "t" is the time.

You need distance and time to calculate the speed.

Speed is how fast an object is going. The direction is irrelevant to speed, not to be confused with velocity, which is speed in a given direction.