Where have i gone wrong with this basic mechanics question?

  • Thread starter Thread starter coffeem
  • Start date Start date
  • Tags Tags
    Mechanics
Click For Summary

Homework Help Overview

The discussion revolves around a basic mechanics question involving calculations related to mass and velocity. The original poster presents an attempt at a solution, which includes a correction regarding the mass of an object.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants suggest re-evaluating arithmetic steps, particularly in the calculation of velocity. There is also a focus on the accuracy of the initial conditions provided, such as the mass of the object.

Discussion Status

The discussion is ongoing, with participants providing feedback on specific calculations and suggesting caution regarding rounding. There is no explicit consensus on the overall correctness of the solution, but some guidance has been offered regarding the arithmetic involved.

Contextual Notes

There is a noted correction regarding the mass of the object, which was initially stated incorrectly. This may affect the calculations being discussed.

coffeem
Messages
91
Reaction score
0

Homework Statement



[PLAIN]http://img155.imageshack.us/img155/7789/questionz.jpg

The Attempt at a Solution



[PLAIN]http://img826.imageshack.us/img826/1492/myatteptm.jpg

NOTE - it said as an aside it was meant to be 8kg and not 18!
 
Last edited by a moderator:
Physics news on Phys.org
Redo the arithmetic in the last step, when solving for v.
 
Doc Al said:
Redo the arithmetic in the last step, when solving for v.

thanks! does the rest of it look ok?
 
coffeem said:
does the rest of it look ok?
Yes, it looks fine. My only suggestion is that you be careful about rounding off too soon.
 

Similar threads

Dynamics - Blocks on an Incline Plane
  • · Replies 5 ·
Replies
5
Views
3K
Solving for Horizontal Projectile Motion: Mechanics Final Question
  • · Replies 10 ·
Replies
10
Views
4K
Gioncoli 4th ed chap4 q59, tension
  • · Replies 3 ·
Replies
3
Views
2K
Electric Force Calculation for Particle 2
  • · Replies 2 ·
Replies
2
Views
2K
System of pulleys - General Understanding
  • · Replies 1 ·
Replies
1
Views
6K
Do the solutions have an error linear+rotational motion of a rigid body
  • · Replies 7 ·
Replies
7
Views
2K
3 blocks no friction forces question
  • · Replies 5 ·
Replies
5
Views
3K
Statics Mechanics: Looking for the flaw in my logic
  • · Replies 19 ·
Replies
19
Views
3K
ChetFinding the Center of Mass of a Figure with a Circular Cutout
  • · Replies 17 ·
Replies
17
Views
4K
Deformation of a Loaded Axial Beam
  • · Replies 1 ·
Replies
1
Views
3K