The bell rings and a physics student heads to class. They stop to talk to a few friends. They slow down to look at a poster on the wall. They get to class just as the bell rings. In the 5 minutes it took
them to get to class, their average speed was 1.4 m/s. How far did they walk?

420m

Explanation:

Given parameters:

Time  = 5minutes

Average speed  = 1.4m/s

Unknown:

Distance covered  = ?

Solution:

Speed is the rate of change of distance with time.

 Mathematically;

              Speed  =  

    Distance  = speed x time

Insert the parameters and solve;

   Convert the time to seconds;

              1 minute = 60s

               5 minute = 5  x 60 = 300s

So,

   Insert the parameters and find the distance;

     Distance  = 300 x 1.4  = 420m

b

explanation: