What is the Final Velocity After Deceleration?

Click For Summary

Homework Help Overview

The problem involves a body with a mass of 9.30 kg that is decelerating uniformly from an initial speed of 9.30 m/s over a time span of 9.30 seconds, covering a distance of 9.30 meters. The goal is to determine the final speed after this period of deceleration.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the appropriate kinematic equations to use for relating initial velocity, final velocity, displacement, and time. There is uncertainty about which specific equation is applicable.

Discussion Status

Some participants have suggested using a kinematic equation for constant acceleration, while others have confirmed the relevance of a specific equation. There is an ongoing exploration of the correct approach to isolate the final velocity.

Contextual Notes

One participant notes that they were not provided with the relevant equation in their handout, indicating a potential gap in resources. The distinction between speed and average speed is also being clarified in the discussion.

ScienceGirl90
Messages
24
Reaction score
0

Homework Statement


An 9.30 kg body moving at 9.30 m/s begins to decelerates uniformly. After 9.30 s the body is 9.30 m from the location were it started to decelerate.
What is the final speed of the body 9.30 s after it started to decelerate?


Homework Equations


I'm not sure what equation to use.


The Attempt at a Solution


I'm not sure how to tackle this problem to find final velocity when I only have initial velocity, time, and distance. Help please!
 
Physics news on Phys.org
You can use a couple of the kinematic equations, but there is a single simple kinematic equation for constant acceleration that relates initial velocity, final velocity, displacement, and time. Which one is that?
 
Would that be the d=1/2(vf+vi)t ?
I wasn't given that equation on my handout but I looked it up.
 
Speed is the magnitude of the velocity. Yes, that is the right equation; solve it for V_f; the magnitude of V_f is its speed. Speed is not distance divided by time. Distance divided by time is average speed. You are looking for the instantaneous speed.
 

Similar threads

  • · Replies 8 ·
Replies
8
Views
2K
Replies
57
Views
3K
  • · Replies 12 ·
Replies
12
Views
1K
  • · Replies 13 ·
Replies
13
Views
7K
Replies
20
Views
2K
Replies
3
Views
2K
  • · Replies 16 ·
Replies
16
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 8 ·
Replies
8
Views
1K
  • · Replies 3 ·
Replies
3
Views
969