Question

a sprinter runs with an average acceleration of 4.5 m/s squared . what is the sprinters speed at 5.0 seconds after leaving the starting block??

Answer 1

the sprinter starts at 0, after 1 sec he is moving at 4.5 m/s, after 2 seconds, at 9 m/s

Answer 2

As we know the formula of Acceleration
Acceleration = Speed / time
got it ?

Answer 3

acceleration is 4.5
speed is suppose x
while time is 5 sec
4.5 x 5 = x
x = 22.5 m
check is this answer present in your answer key ?