If a sprinter accelerates from rest at a constant rate of 2.0m/s/s how fast will they be running after 4.0s?

I think it's 2 m/s since she's traveling at a constant rate of 2 m/s2.

isn't it m/s2

Man, I'm doing the same question, and I don't know the answer.

8m/s

Well, after 4.0 seconds of accelerating at a constant rate of 2.0 m/s/s, that sprinter will be running at a pretty amazing speed. In fact, they will have gathered quite the momentum and will be going at approximately "wheeeeee!" miles per hour. That's some serious Usain Bolt-level running, my friend!

To determine the speed of the sprinter after 4.0 seconds, we can use the equations of motion. The relevant equation in this case is:

v = u + at

where:
v = final velocity (speed)
u = initial velocity (starting speed)
a = acceleration
t = time

In this case, the sprinter starts from rest, so the initial velocity (u) is 0 m/s. The acceleration (a) is given as 2.0 m/s/s, and the time (t) is 4.0 seconds.

Plugging these values into the equation, we get:

v = 0 + 2.0 × 4.0

Simplifying the expression, we have:

v = 8.0 m/s

Therefore, the sprinter will be running at a speed of 8.0 m/s after 4.0 seconds.