A sprinter speeds up to 3 m/s during the last 2 seconds of the race with an acceleration of 0. 4 m/s 2 . What was the initial speed of the sprinter?

The initial speed of the sprinter was 2.2 m/s

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

The following relation applies:

Where a is the constant acceleration, vo the initial speed, vf the final speed, and t the time.

The sprinter speeds up from an unknown initial speed to vf=3 m/s in t=2 seconds with an acceleration of .

To find the initial speed, we solve the equation for vo:

Substituting the values:

The initial speed of the sprinter was 2.2 m/s

1= 26.17

2= 1.17

3=30.86

4=5.86

just took the assigment on edge