Making Inferences From Motion Graphs

Thread starter Bashyboy
Start date Sep 6, 2012
Tags

Graphs Motion

AI Thread Summary

A velocity-time graph indicates negative motion when the graph lies below the time-axis, representing negative velocity. This suggests that the object is moving in the opposite direction, or "backwards." The graph does not directly show the direction of motion but indicates when a change occurs. A negative value on the graph confirms that the object is reversing its motion. Understanding these graph interpretations is crucial for analyzing motion effectively.

Sep 6, 2012

Bashyboy

The question is: "How can you tell from a velocity-time graph that you are moving in the negative?

I don't believe a velocity-time graph reveals that sort of information. Can't you only determine when the direction of motion has changed?

Physics news on Phys.org

Sep 6, 2012

Bashyboy

Perhaps you can...Would the answer be that the graph would lie under the time-axis?

Sep 6, 2012

SydDF

If you mean going backwards, your velocity would be negative. Thus you would actually be reversing

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'

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 »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »