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    Name:  image.jpg
Views: 127
Size:  315.7 KB I have this velocity time graph and I have to find the velocity when t=1. I get 1m/s but the answers say 3m/s. What am I doing wrong?
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    (Original post by Bobrey)
    Name:  image.jpg
Views: 127
Size:  315.7 KB I have this velocity time graph and I have to find the velocity when t=1. I get 1m/s but the answers say 3m/s. What am I doing wrong?
    That doesnt make any sense you are saying you have v-t graph but in image its x-t graph. can you send the whole question?
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    (Original post by Reda2)
    That doesnt make any sense you are saying you have v-t graph but in image its x-t graph. can you send the whole question?
    Sorry my post meant to to say x-t graph - the picture is correct
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    (Original post by Bobrey)
    Sorry my post meant to to say x-t graph - the picture is correct
    Yes, so velocity at t=1 is the gradient of the line starting at t=0 and ending at t=2. (I get 1 ms^-1 as well)
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    (Original post by Zacken)
    Yes, so velocity at t=1 is the area under the graph between t=0 and t=1. Which is a triangle, which has area...?
    No that is not correct, the area under the graph for x-t graphs is equal to nothing, the gradient is equal to the velocity.
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    (Original post by Reda2)
    No that is not correct, the area under the graph for x-t graphs is equal to nothing, the gradient is equal to the velocity.
    Whoops, my bad. Was thinking of the wrong thing when I said area. Thanks! Will edit.

    (by the way, it's not equal to nothing. )
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    (Original post by Zacken)
    Whoops, my bad. Was thinking of the wrong thing when I said area. Thanks! Will edit.

    (by the way, it's not equal to nothing. )
    Oh really, what is it equal to?

    But do you think the mark scheme is wrong? the gradient is clearly 1 and velocity is constant in that line.
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    (Original post by Reda2)
    Oh really, what is it equal to?

    But do you think the mark scheme is wrong? the gradient is clearly 1 and velocity is constant in that line.
    I think so, I get 1 ms^-1 as well.
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    (Original post by Zacken)
    I think so, I get 1 ms^-1 as well.
    Just realised something, your guy in your avatar is saying something, what is it?
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    (Original post by Reda2)
    Just realised something, your guy in your avatar is saying something, what is it?
    Watch this, relevant bit is at around ~50 seconds in.
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    (Original post by Zacken)
    Watch this, relevant bit is at around ~50 seconds in.
    Find out what happens to solid water when it gets waaaarm? lol
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    (Original post by Reda2)
    Find out what happens to solid water when it gets waaaarm? lol
    It's hilarious. :rofl:
 
 
 
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