# I really don't get this question

1. Sep 30, 2012

### weesieman

1. The problem statement, all variables and given/known data

A supersonic jet ﬂying at 160 m/s is being
accelerated uniformly at 23.7 m/s for 20 s.
What is its ﬁnal velocity?
Answer in units of m/s

2. Relevant equations
V(final) = V(initial)^2 +2ad. Well thats what I tried using but we just started this topic and Im not sure at all.

3. The attempt at a solution

2. Sep 30, 2012

### Staff: Mentor

Since you don't have distance, that won't help. But what's the most basic definition of acceleration?

3. Sep 30, 2012

### weesieman

The rate that velocity changes

4. Sep 30, 2012

### Staff: Mentor

Good. Express that mathematically.

5. Sep 30, 2012

### weesieman

v=d/t

6. Sep 30, 2012

### Staff: Mentor

That's velocity. What about acceleration?

7. Sep 30, 2012

### Staff: Mentor

8. Sep 30, 2012

### weesieman

oh right I think i got it. vf-vi/t

9. Sep 30, 2012

### Staff: Mentor

Good! a = (vf - vi)/t.

So, reverse that around and solve for vf.

10. Sep 30, 2012

### weesieman

thanks i got it