Acceleration of an object w/ mass vs. friction

Click For Summary

Homework Help Overview

The discussion revolves around a physics problem involving an object sliding on a surface with friction. The original poster presents a scenario where a 0.3 kg object experiences a friction force of 0.2 N and has an initial velocity of 2.7 m/s, seeking to determine the time it takes to stop and the duration of the slide.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the application of Newton's second law (F=ma) and suggest considering conservation of energy as an alternative approach. There are questions regarding the understanding of concepts related to acceleration and kinematic equations.

Discussion Status

The discussion includes attempts to clarify the relationship between friction, acceleration, and time. Some participants provide guidance on how to approach the problem, while others express uncertainty about concepts that may not have been covered in their learning.

Contextual Notes

There is mention of a mental block experienced by the original poster, and some participants indicate a lack of familiarity with certain concepts, such as conservation of energy, which may affect their ability to engage with the problem fully.

Spaghett
Messages
3
Reaction score
0

Homework Statement


An 0.3kg object slides across a surface, experiencing a friction force of 0.2N. If its initial velocity is 2.7m/s, how long does it take to stop and how long does it slide for?


Homework Equations


F=ma


The Attempt at a Solution


I know I'm just missing a simple step or solution, but I'm just at a complete mental block right now.
 
Physics news on Phys.org
Spaghett said:

Homework Equations


F=ma

Maybe you'd want to consider conservation of energy instead as it is a bit easier?
 
What do you mean? I don't think i ever learned that
 
Spaghett said:
What do you mean? I don't think i ever learned that

Ah sorry, I didn't see that you need the time as well.

If you have the frictional force, what is the associated acceleration?

When the mass stops, what is the final velocity?

What kinematic equation do you know involves initial velocity, final velocity acceleration and time?
 
I figured it out guys, simple F=ma, just didn't know i could use the force of friction as F, thanks anyhow
 

Similar threads

Friction, Mass and Acceleration: Analyzing Block Motion
  • · Replies 6 ·
Replies
6
Views
2K
How Does Friction Affect Acceleration on an Incline?
  • · Replies 19 ·
Replies
19
Views
3K
Finding the work done by a block
  • · Replies 4 ·
Replies
4
Views
3K
Friction and an object stopping
  • · Replies 12 ·
Replies
12
Views
3K
Calculating acceleration from the coefficient of kinetic friction
  • · Replies 48 ·
2
Replies
48
Views
8K
Calculating Kinetic Friction Coefficient for Sliding Soccer Player
  • · Replies 13 ·
Replies
13
Views
2K
Having a hard time learning Newton's 2nd law
  • · Replies 5 ·
Replies
5
Views
2K
Intuition on the direction of friction in a rotational dynamics problem
  • · Replies 13 ·
Replies
13
Views
2K
Does coefficient of kinetic friction depend on speed?
  • · Replies 16 ·
Replies
16
Views
6K
Finding the time it takes for two stacked blocks to travel
  • · Replies 18 ·
Replies
18
Views
3K