Find time given velocity and distance

  • Thread starter Calhoun295
  • Start date
  • #1

Homework Statement



A certain vehicle requires a distance of 29 m to stop when it is traveling at 28 m/s.
(a) What magnitude of acceleration is produced by braking under these conditions?
(b) If a jaywalker is 27 m in front of the vehicle when the driver first applies the brakes, how much time does the pedestrian have to get out of the way?

Homework Equations



v=vo + at
x - xo = vot + [tex]\frac{1}{2}[/tex]at2
v2 = vo2 + 2a(x - xo)

are the given equations for what we're learning.

The Attempt at a Solution



(a) 13.52m/s2
(b) is what I cannot find
 

Answers and Replies

  • #2
Doc Al
Mentor
44,994
1,269
I'll rephrase the question: How long does it take the vehicle to cover 27 m?
 

Related Threads on Find time given velocity and distance

Replies
12
Views
16K
Replies
1
Views
1K
Replies
3
Views
24K
Replies
3
Views
13K
Replies
1
Views
1K
Replies
4
Views
1K
Top