I really don't get this question

  • Thread starter weesieman
  • Start date
  • #1
8
0

Homework Statement



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

Homework 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.




The Attempt at a Solution

 

Answers and Replies

  • #2
Doc Al
Mentor
44,978
1,245
V(final) = V(initial)^2 +2ad. Well thats what I tried using but we just started this topic and Im not sure at all.
Since you don't have distance, that won't help. But what's the most basic definition of acceleration?
 
  • #3
8
0
The rate that velocity changes
 
  • #4
Doc Al
Mentor
44,978
1,245
The rate that velocity changes
Good. Express that mathematically.
 
  • #6
Doc Al
Mentor
44,978
1,245
  • #8
8
0
oh right I think i got it. vf-vi/t
 
  • #9
Doc Al
Mentor
44,978
1,245
oh right I think i got it. vf-vi/t
Good! a = (vf - vi)/t.

So, reverse that around and solve for vf.
 
  • #10
8
0
thanks i got it
 

Related Threads on I really don't get this question

  • Last Post
Replies
24
Views
4K
Replies
2
Views
8K
Replies
6
Views
3K
Replies
1
Views
889
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
1
Views
2K
Replies
2
Views
3K
  • Last Post
Replies
7
Views
5K
  • Last Post
Replies
9
Views
2K
Top