No Attempt at a SolutionLost & Confused: Help Needed

  • Thread starter Thread starter jimmehx3
  • Start date Start date
  • Tags Tags
    Lost
AI Thread Summary
The discussion revolves around a homework problem where the individual is confused about calculating the distance from start to finish based on a given diagram. They mistakenly added all the lengths together, which is incorrect as the task requires finding the direct distance. Suggestions include creating a scale drawing for measurement or using trigonometry to determine the x and y coordinates of the finish point relative to the start. Accurate drawing and calculations are emphasized to achieve the correct result. Understanding vector components and their addition is crucial for solving the problem effectively.
jimmehx3
Messages
3
Reaction score
0
I am totally lost :(

Homework Statement


[URL]http://i578.photobucket.com/albums/ss223/fuyu0201/feb61411.jpg[/URL]


Homework Equations


umm, i have no idea. the teacher didnt really teach us this yet.


The Attempt at a Solution


i just added all the lengths together lol, but that was wrong.
 
Last edited by a moderator:
Physics news on Phys.org


It just asks for the distance from start to finish - direct.
You could make a scale drawing and measure the answer.
Or use trigonometry to figure out the x,y position of the finish relative to the start.
 


wait, so i just add 105, 459, 286 and 222 together?
 


No. You must find the distance from beginning to end as the crow flies. It will be much less than 459 if the diagram is at all accurate. But you really need a very accurate drawing, made with ruler and protractor.

Or you could find the x and y components of each vector using trigonometry, and add them up separately.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How do I interpret and graph Newton's second law data?
Replies
1
Views
2K
Momentum and Impulse separation question
Replies
1
Views
1K
Can anyone check my working on the resultant force ,test question
Replies
11
Views
3K
Use the node-voltage to find v1 and v2 in the circuit below
Replies
14
Views
11K
What is the correct speed to keep the cylinder at rest?
Replies
2
Views
1K
2 problems: potential erg & tension/friction
Replies
3
Views
1K
How to Derive the Acceleration of Mass A in a Double Atwood Machine?
Replies
7
Views
8K
Forces and torque on a cable/beam
Replies
7
Views
4K
Fraction of lost energy in compton scattering
Replies
18
Views
4K
Potential due to Uniform Charge Distribution (3d)
Replies
5
Views
1K

Hot Threads

Recent Insights

Back
Top