Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Vector problem (A2+ level)

Question attached - I'm struggling with how to start solving this.

Problem rabbits.png83.5KB

B ...> 3ti+4tj
P ...> 5(t-1)i + 2(t-1)j -i +2j

Find F and solve

Possibly the wine is kicking in

(edited 12 years ago)

OP

Original post by TenOfThem

B ...> 3ti+4tj
P ...> 5(t-1)i + 2(t-1)j

Find F and solve

why (t-1)? wouldn't it be t-10?

Why would it be -10 ?

But I did get a bit wrong .... Will correct

OP

Original post by TenOfThem

But I did get a bit wrong .... Will correct

Because P starts 10 seconds later

Original post by -jessica

Because P starts 10 seconds later

Thought it was 1 sec later

OP

Oh sorry, the problem in front of me is the same as that one but with 10 secs instead of 1 and 10m instead of 1m. I should have checked. That means that we agree :tongue:

:tongue:

What answer did you get? I got that it gets P at (300,150) after 70s

I have changed my approach and have looked to see where they all are when the fox starts

Then found the time vector from there

I have (t = time + 2)
B = (3t+7)i+(4t+9)j
P =(5t+5)i+(2t+5)j
F = (5t+5)i+(3t+0)j

So I then get catch P at t=5

Giving after 7 seconds

At (30,15)

(edited 12 years ago)

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