# maths question help asap

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A car is travelling on a straight horizontal road, the velocity of the car v ms^-1 at time t seconds as it passes three point, P Q and R. It is modelled by the equation v=at^2+bt+c

The car passes P at time t=0 with velocity 8ms-1

c=8

The car passes Q at t=5 and at that instant its deceleration is 0.12 ms-2

The car passes R at t=18 with velocity 2.96 ms-1

b) determine the value of a and b

c) find to the nearest metre the distance between points P and R

The car passes P at time t=0 with velocity 8ms-1

c=8

The car passes Q at t=5 and at that instant its deceleration is 0.12 ms-2

The car passes R at t=18 with velocity 2.96 ms-1

b) determine the value of a and b

c) find to the nearest metre the distance between points P and R

Last edited by Megan.thompson.x; 4 weeks ago

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#2

(Original post by

A car is travelling on a straight horizontal road, the velocity of the car v ms^-1 at time t seconds as it passes three point, P Q and R. It is modelled by the equation v=at^2+bt+c

The car passes P at time t=0 with velocity 8ms-1

c=8

b) determine the value of a and b

c) find to the nearest metre the distance between points P and R

**Megan.thompson.x**)A car is travelling on a straight horizontal road, the velocity of the car v ms^-1 at time t seconds as it passes three point, P Q and R. It is modelled by the equation v=at^2+bt+c

The car passes P at time t=0 with velocity 8ms-1

c=8

b) determine the value of a and b

c) find to the nearest metre the distance between points P and R

https://www.thestudentroom.co.uk/sho....php?t=4919248

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I can't do the question at all! Hence I'm asking on here how to do it.. that is the full question also.

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#5

(Original post by

I can't do the question at all! Hence I'm asking on here how to do it.. that is the full question also.

**Megan.thompson.x**)I can't do the question at all! Hence I'm asking on here how to do it.. that is the full question also.

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yes..

that is all the information I was given which I included in my original post

that is all the information I was given which I included in my original post

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#8

(Original post by

yes..

that is all the information I was given which I included in my original post

**Megan.thompson.x**)yes..

that is all the information I was given which I included in my original post

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#9

**Megan.thompson.x**)

yes..

that is all the information I was given which I included in my original post

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(Original post by

Err, you've just edited your OP to put the exra info in. I'll leave you to solve it.

**mqb2766**)Err, you've just edited your OP to put the exra info in. I'll leave you to solve it.

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#11

(Original post by

You just didn't know how to answer the question in the first place

**hypan6**)You just didn't know how to answer the question in the first place

It should at least be very obvious what the first step is to answering part b) is, considering that you used the same step in part a). Substitute the values in and see what equations you get.

You could potentially use calculus to solve part c, once you know all the constants.

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#12

(Original post by

The fact that two users have randomly asked the same question, both missing the same parts of the question out, suggest you are both the same person or at least a group of friends just trying to do your homework together.

It should at least be very obvious what the first step is to answering part b) is, considering that you used the same step in part a). Substitute the values in and see what equations you get.

You could potentially use calculus to solve part c, once you know all the constants.

**0le**)The fact that two users have randomly asked the same question, both missing the same parts of the question out, suggest you are both the same person or at least a group of friends just trying to do your homework together.

It should at least be very obvious what the first step is to answering part b) is, considering that you used the same step in part a). Substitute the values in and see what equations you get.

You could potentially use calculus to solve part c, once you know all the constants.

Last edited by mqb2766; 4 weeks ago

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**0le**)

The fact that two users have randomly asked the same question, both missing the same parts of the question out, suggest you are both the same person or at least a group of friends just trying to do your homework together.

It should at least be very obvious what the first step is to answering part b) is, considering that you used the same step in part a). Substitute the values in and see what equations you get.

You could potentially use calculus to solve part c, once you know all the constants.

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#14

(Original post by

I clearly didn't realise that there was extra information, so I added it in. Thank you hypan6 for being so nice, at least some people are.

**Megan.thompson.x**)I clearly didn't realise that there was extra information, so I added it in. Thank you hypan6 for being so nice, at least some people are.

(Original post by

I am an a level maths student and was asking for help on a question I could not do. Simple as. I’m not stupid hence I take a level maths and this question was not as simple as just substitute the values in hence why it wasn’t one mark like the first question. There are not four of us, I posted the question myself twice and don’t know what or why anyone else has so there’s no need to be rude whatsoever. The point of this forum is to ask questions when you are unsure and it is for students, hence the name. So me, as an a level maths STUDENT asked a question 👍🏼

**Megan.thompson.x**)I am an a level maths student and was asking for help on a question I could not do. Simple as. I’m not stupid hence I take a level maths and this question was not as simple as just substitute the values in hence why it wasn’t one mark like the first question. There are not four of us, I posted the question myself twice and don’t know what or why anyone else has so there’s no need to be rude whatsoever. The point of this forum is to ask questions when you are unsure and it is for students, hence the name. So me, as an a level maths STUDENT asked a question 👍🏼

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#16

**Megan.thompson.x**)

I am an a level maths student and was asking for help on a question I could not do. Simple as. I’m not stupid hence I take a level maths and this question was not as simple as just substitute the values in hence why it wasn’t one mark like the first question. There are not four of us, I posted the question myself twice and don’t know what or why anyone else has so there’s no need to be rude whatsoever. The point of this forum is to ask questions when you are unsure and it is for students, hence the name. So me, as an a level maths STUDENT asked a question 👍🏼

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(Original post by

The forum rules require you to post what you've tried so we can give you a hint - TSR is NOT a homework service.

**Muttley79**)The forum rules require you to post what you've tried so we can give you a hint - TSR is NOT a homework service.

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#18

(Original post by

And I haven't / hadn't done anything for this question hence there was nothing I could post? I had no idea how to do it so came here for help to hint how to do it or give me a method I could use 👍

**Megan.thompson.x**)And I haven't / hadn't done anything for this question hence there was nothing I could post? I had no idea how to do it so came here for help to hint how to do it or give me a method I could use 👍

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