Question

The timekeeper in a 100 m race start at the finishing post, he starts his watch at the moment he hears the sound of the gun. what error does he make timing the race

Answer 1

Explanation:

Because when gun is fired , sound takes some time to reach to the listener (time keeper) , so if he wait for the sound , he will be late a bit . Whereas smoke comes out from the gun just after the fire .