Looking for an answer to the question below
If a sprinter runs with constant acceleration for the first 25 yd. of a 100 yd-dash and then runs the rest of the race at constant velocity, what would his constant acceleration have to be if he is to run the race in 10 sec?
Distance left to traveld = 100 - 25 = 75 yards
Distance = initail Velocity x time + ½ Accelaration x Time ²
75 = 0 + ½ Accelarrtion (10)²
(75 x 2) 100 = Accelaration
Accelaration = 1.5 yard/sec² ◄ Ans