Question

A sprinter starts their race from the 0 position and reaches their constant velocity of 8.7 m/s when they are at 32 meters in the from the starting line. How far from the starting line will the sprinter be if they continue at the speed for 5 more seconds?

Answer 1

Given : Initial speed , u = 0 m/s .

Final speed , v = 8.7 m/s .

Distance travelled , d = 32 m .

To Find :  How far from the starting line will the sprinter be if they continue at the speed for 5 more seconds .

Solution :

It is given that after reaching speed of 8.7 m/s speed become constant .

So , distance covered in 5 second is :

$d=v \times t\\d=8.7 \times 5 \ m\\d=43.5 \ m$

Now , total distance from start line is :

$D=32+43.5=75.5 \ m$

Therefore , the distance from starting line is 75.5 m .

Hence , this is the required solution .