Question

Jermaine runs exactly 2 laps around a 400 meter track. At the beginning of her run the clock read 3:02:00 PM. At the end her clock read 3:04:45 PM. Find the distance (d) the person traveled. calculate the speed using distance and total time. find the displacement. calculate the velocity. HELP

Answer 1

Explanation:

Given parameters:

Jermaine runs exactly 2 laps around a 400m track

Start time  = 3:02:00PM

End time  = 3:04:45PM

Unknown:

Distance traveled  = ?

Speed  = ?

Displacement  = ?

Velocity  = ?

Solution:

To solve this problem, we need to find the distance and time first;

        Distance  = 2 x 400  = 800m

Time taken  = 3:04:45PM  - 3:02:00PM  = 165s

Speed  = $\frac{distance}{time}$   = $\frac{800}{165 }$   = 4.85m/s

The velocity of the body is 0m/s and so is the displacement.

This is because the starting and finishing position of the Jermaine is the same.