Bobby runs with an average velocity of 7.5 m/s over a straight-line distance of 90 meters. Calculate the time Bobby ran?

12s

Explanation:

Given parameters:

Velocity  = 7.5m/s

Distance  = 90m

Unknown:

Time taken  = ?

Solution:

Speed is the rate of distance traveled with time. It is mathematically expressed as;

      Speed  =

Since the unknown is time;

        Time  =  

      Insert the parameters and solve;

  Time  =   = 12s

explanation:

newton's third law, for every action there is an equal and opposite reaction.