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Force - Time graph Question

by aham925925
Tags: force, graph, time
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aham925925
#1
Dec13-07, 11:21 PM
P: 30
Hi everybody,

I was given a set of physics problems and some of them ask us to find work. The problem is, we are given a force-time graph as opposed to a force-distance graph. My question was whether there was a way of finding work done using a force-time graph. I don't see how it could be done and i haven't found anywhere where you can do it but I have a feeling it can be done.

Does anyone know? Please reply either if it can or can't be done...

Thank you
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kplooksafterme
#2
Dec13-07, 11:29 PM
P: 47
Not if the force and dt are the only info given...
kplooksafterme
#3
Dec13-07, 11:31 PM
P: 47
Sry, ignore my last post. Yes, you can.

aham925925
#4
Dec13-07, 11:34 PM
P: 30
Force - Time graph Question

Sorry, how can you find it out?

I tryed the area under the graph but that doesn't work
aham925925
#5
Dec13-07, 11:35 PM
P: 30
Sorry, how can you find it out?

I tried the area under the graph but that doesn't work
kplooksafterme
#6
Dec14-07, 12:31 AM
P: 47
What kind of force-time graphs are they? I'm guessing they're impulse graphs (large force over relatively short period of time); if so, you can assume the impulse approximation. What does this tell you about the work done (or more precisely, the distance traveled due to a force)?
aham925925
#7
Dec14-07, 01:30 AM
P: 30
Yes, they are graphs with large forces over small amounts of time.

I'm sorry but I can't see the connection between this graph and work and/or distance.

If it helps, one of the questions talks about a railway engine of x mass moving from rest along a straight track. It then gives you the force-time graph.
aham925925
#8
Dec14-07, 06:47 PM
P: 30
It's ok now...I've figured out the answer

Thanks everyone for your help
rustyphysics
#9
Sep18-09, 04:08 AM
P: 7
Hi,

I have the same question as you. How did you find the work done using force - time graph?? Thanks.


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