M1 position vectors help!!

Hi, I have started learning vector by myself but I find this really confusing. Is the position vector the starting point? The equation r=r0+vt. What does each r stand for? It would be great if anyone could explain this question to me because I just don't understand the topic and I did spend time on it. Thanks

it's q1 I am referring to.

(edited 8 years ago)

Reply 1

coconut64

OP

16

I don't really know where to start because I am given two position vectors and I don't know if r is the position factor Or r0 and what is r? thanks so much.

Reply 2

Kieranoo

2

They are both r. You need to put the first one in to the equation r=r0+ut+0.5at^2 (t=2) to find r0 and then put that in to the equation to find r with t=6 :smile:

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Reply 3

coconut64

OP

16

Original post by Kieranoo

They are both r. You need to put the first one in to the equation r=r0+ut+0.5at^2 (t=2) to find r0 and then put that in to the equation to find r with t=6 :smile:

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Hi, thanks for helping. Do you mind explaining what position vector actually is ? Is it the starting point? Also the equations that I know are only r=r0+vt and some other suvat equation, I have no idea which one you just used.

Reply 4

Kieranoo

2

Original post by coconut64

Hi, thanks for helping. Do you mind explaining what position vector actually is ? Is it the starting point? Also the equations that I know are only r=r0+vt and some other suvat equation, I have no idea which one you just used.

The position vector is basically coordinates, so i is x and j is y. R0 is the 'starting point' if using it in a question if you're working out r as the 'new position'. The two ruvat equations (suvats with vectors) are the one you said and the one I said :smile:

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Reply 5

coconut64

OP

16

Original post by Kieranoo

The position vector is basically coordinates, so i is x and j is y. R0 is the 'starting point' if using it in a question if you're working out r as the 'new position'. The two ruvat equations (suvats with vectors) are the one you said and the one I said :smile:

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