Question

John runs 120 meters in 10 seconds. What is his speed?A.1.2 m/s B.12 m/s2C.12 m/sD.1.2 m/s2what one is right?

Answer 1

The speed is defined as:

`v=(d)/(t)`

where d is the distance and t is the time. In this case the distance is 120 meters and the time is 10 seconds. Then we have:

`v=\frac{120\text{ m}}{10\text{ s}}=12\text{ m/s}`

Therefore the answer is C