Question

1. which of the following is used to measure speed?

○ meters
○ seconds
○ meters per seconds
○ seconds per meters

Explanation:

Step1: Recall speed formula

Speed is defined as the distance traveled divided by the time taken, so the formula is \( \text{Speed} = \frac{\text{Distance}}{\text{Time}} \).

Step2: Analyze units

Distance is often measured in meters, and time in seconds. So when we divide distance (meters) by time (seconds), the unit becomes meters per second.

• "meters" is a unit of distance, not speed.
• "seconds" is a unit of time, not speed.
• "seconds per meters" would be the reciprocal of speed (time per distance), not speed.
• "meters per seconds" (should be "meters per second") is the unit for speed as it represents distance over time.

Answer:

The option with "meters per seconds" (correctly "meters per second") is the unit for speed. Assuming the options are labeled (from left to right as first, second, third, fourth): The second option (meters per seconds) is the one used to measure speed.