Question

A runner is training and runs past meter mark 65 and starts a stopwatch. After the runner passes meter mark 15 the stopwatch stops at 8 seconds.

What was the runners velocity?
Question options:
-6.25 m/s
6.25 m/s
8.13 m/s
-1.88 m/s

Answer 1

6.25 m/s

Step-by-step explanation:

Given parameters

Initial mark = 65

Final mark = 15

time taken = 8s

Unknown:

Velocity of the runner = ?

Solution:

Velocity is the displacement divided by time;

Velocity =
`(displacement)/(time)`

Displacement = Initial mark - final mark = 65 - 15 = 50m

Now, insert the parameters and solve;

Velocity =
`(50)/(8)` = 6.25m/s