Question

a runner starts from rest and has an acceleration of 3 m/s2 how fast is she running after 1.1 seconds

Answer 1

acceleration = (velocity final - velocity initial) / time.

In your question we're solving for time so the rearranged formula would be

acceleration/ time = (velocity final - velocity initial).

Since we can assume she started running from rest the initial velocity is 0 m/s.

Plug in your values for acceleration and time and you will have your answer.

( 3 m/s squared)
________________ = velocity
1.1 seconds

Good luck :)

Answer 2

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Answer 3

The initial velocity is given as 0, and the acceleration is constant. Therefore we have:
\[v=at\]
\[v=3\times1.1=3.3\ m/s\]