physics help!!!!!! (1 Viewer)

[bubblesss]

hey guys,

could someone tell me how to draw, interpret graphs? is there a particular website for it? at the mo, i'm having problems with the variables used in the graph. eg how to plot a graph of constant acceleration on a velocity against time graph?

thanks in advance!!!!!!!!!!!

 

[Continuum]

Uhh... if it's constant acceleration, it will just be an angled line on a velocity-time graph. The gradient of this angled line will just be the value for acceleration.

 

[bubblesss]

Uhh... if it's constant acceleration, it will just be an angled line on a velocity-time graph. The gradient of this angled line will just be the value for acceleration.

how do u plot constant acceleration on a force- time , displacement time graph?? how do u know if its gonna be a curve or a straight line???

 

[youngminii]

You really don't need to go in depth about it
In my Physics test (Independent) there was like.. 1? question relating to that, easy and only worth a few marks

In a velocity-time graph, the higher the acceleration, the higher the slope of the straight line (if it's a horizontal line, it's going at constant speed)
In a displacement-time graph, acceleration will be shown as a curve whereas constant speed is a straight line (if it's a horizontal line, the velocity is 0)

To help understand it, think about it
As time goes on, if the velocity is the same, then it'll just stay as a horizontal line on the velocity-time graph
If there's acceleration, then the velocity is getting higher, making the line slope upwards

In a displacement-time graph, as time goes on, if the displacement is the same then the object hasn't moved, therefore velocity = 0
But if the object is moving at a constant speed/velocity, then the line is sloped upwards
If the object is getting faster and faster, then as time goes on the object's displacement increases exponentially, making it a curve

Good luck

 

[bubblesss]

You really don't need to go in depth about it
In my Physics test (Independent) there was like.. 1? question relating to that, easy and only worth a few marks

In a velocity-time graph, the higher the acceleration, the higher the slope of the straight line (if it's a horizontal line, it's going at constant speed)
In a displacement-time graph, acceleration will be shown as a curve whereas constant speed is a straight line (if it's a horizontal line, the velocity is 0)

To help understand it, think about it
As time goes on, if the velocity is the same, then it'll just stay as a horizontal line on the velocity-time graph
If there's acceleration, then the velocity is getting higher, making the line slope upwards

In a displacement-time graph, as time goes on, if the displacement is the same then the object hasn't moved, therefore velocity = 0
But if the object is moving at a constant speed/velocity, then the line is sloped upwards
If the object is getting faster and faster, then as time goes on the object's displacement increases exponentially, making it a curve

Good luck

thanks a lot!!!!!!!!!!!!:wave:

 

[ratcher0071]

Here's a cool method:

distance/displacement ---gradient gives---> speed/velocity ---gradient gives---> acceleration

In other words, the gradient of the distance/displacement graph tells the speed /velocity, and the gradient of the speed/velocity graph tells the acceleration

 

[bubblesss]

Here's a cool method:

distance/displacement ---gradient gives---> speed/velocity ---gradient gives---> acceleration

In other words, the gradient of the distance/displacement graph tells the speed /velocity, and the gradient of the speed/velocity graph tells the acceleration

by chance do u know what a force against time graph represents?

 

[Shoom]

HELP PLEASE!


In a velocity time graph. I have the y axis which is from -15 to +15 and time from 0 to 40s when the line on the graph dips below the 0ms what does it mean?

because even in the positive zone of the graph the elevator decelerates once its below the 0ms thing what is it saying?

DW, the nerves are really getting to me.

 

[ratcher0071]

by chance do u know what a force against time graph represents?

I'll give you an example: the effect of Crumple Zones in cars

Click this link and go to the graph:
http://www.k12.nf.ca/gc/Science/Physics3204/Projects2003/SlotA/ProjectA2/link20.htm

 

[bubblesss]

could anyone please tell me how to find the potential differnce between two points in both parallel and series connection????? HELP ASAP

 

[bubblesss]

I'll give you an example: the effect of Crumple Zones in cars

Click this link and go to the graph:
http://www.k12.nf.ca/gc/Science/Physics3204/Projects2003/SlotA/ProjectA2/link20.htm

thanks for the info!!!!!!!!!!!!!1:wave:

 

[ratcher0071]

could anyone please tell me how to find the potential differnce between two points in both parallel and series connection????? HELP ASAP

potential difference is another word for VOLTAGE

Formula:

Voltage (volts)=Current (amperes) x Resistance (ohms)
V=IR

 

[bubblesss]

Help Please

physics questions -
1)compare the generation of a magnetic field by a solenoid and a bar magnet?
2) explain how a radio wave is modulated?

thanks in advance

 

[ratcher0071]

Re: Help Please

physics questions -
1)compare the generation of a magnetic field by a solenoid and a bar magnet?
2) explain how a radio wave is modulated?

thanks in advance

1)
Solenoid:
A solenoid is a coil of insulated wire with a current passing through it. It utilises the principle that current has an associated magnetic field. A solenoid with an iron core inside it, intensifies the magnetic field (electromagnet).

Bar Magnet:
Permanent magnets are made out of ferromagnetic material (iron, cobalt, nickel). Ferromagnetic materials derive their magnetic properties from the spin motion of electrons in atoms. They have magnetic domains in which the spins of electrons line up with each other to produce north and south poles.

2)
2 ways that radio waves are modulated: Amplitude modulation (AM) and Frequency modulation (FM)

These links will help:
AM: http://en.wikipedia.org/wiki/Amplitude_modulation
FM: http://en.wikipedia.org/wiki/Frequency_modulation

Hope this helps!

 

[bubblesss]

Re: Help Please

thanks a lot ratcher!!!!!!!!!!!!!!!:uhhuh: :uhhuh: :uhhuh:

 

[bubblesss]

physics help ASAP

hey guys,

can someone please answer this question?

what are the physics principles used in a CD?

i know its in my book but its extremely big. can someone please give me the important points that should be mentioned for this answer? i really dont know which stuff to talk about and which not.

thanks in advanced!!!!!!!1

 

[bubblesss]

Re: physics help ASAP

hey guys,

can someone please answer this question?

what are the physics principles used in a CD?

i know its in my book but its extremely big. can someone please give me the important points that should be mentioned for this answer? i really dont know which stuff to talk about and which not.

thanks in advanced!!!!!!!1

bumity bump

help guys!!!!!1

 

[Pink Oni]

Re: physics help ASAP

bumity bump

help guys!!!!!1

I would've helped, but I studied GPS instead of CD technology xD

 

[bubblesss]

Re: physics help ASAP

I would've helped, but I studied GPS instead of CD technology xD

tats ok can u help me with GPS? doesn't matter!!!!!!

 

[ratcher0071]

Re: physics help ASAP

Use this link:

http://en.wikipedia.org/wiki/GPS#Basic_concept_of_GPS_operation