The velocity of an object is the displacement in a unit interval of time.
In the problem, we assume that the track is a straight one and 2000 m in length. Here the winner takes 40 seconds to cover a distance of 2000 m.
So the velocity is given by (2000/ 40) m/s
=> 50 m/s
Therefore the required velocity of the winner is 50 m/s.
We'll write the formula for the velocity: the distance travelled/time taken.
From enunciation, we know that displacement: d = 2000 m, and the time taken, t = 40 s.
We'll just have to substitute the data into the formula:
the velocity of the winner = 2000 m/ 40 s
We'll simplify and we'll get:
v = 50 m/s
The velocity of the winner to reach the end point is v = 50 m/s.