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# Need help with another vector question watch

1. hi, I have a few questions about how to answer some of the questions

1) for part c, ball is due north of b andto do this, the I components would be 0. However, when do you know that you need to equate the I component with the I componet of the ball to find I? Because at first I did 10=2+5tj.

2) for part d, would the position Vectorof the player be 10i +7j or just 7j ? If it's 10i +7j, 10 I would be cancelled out anyway 10i+13.8j=10i+ (7j+1.6v) this is what I did , is this right? 10i cancels each other out then solve for t. I got the right answer it's just that I am a bit consumed about this part
Thanks.
2. (Original post by coconut64)
hi, I have a few questions about how to answer some of the questions

1) for part c, ball is due north of b andto do this, the I components would be 0. However, when do you know that you need to equate the I component with the I componet of the ball to find I? Because at first I did 10=2+5tj.
If it is due north of b that means the i component will be the same as the i component of b. Try drawing a point B on a graph and then another point just above it, can you see that their x-coordinares are the same?
3. (Original post by Zacken)
If it is due north of b that means the i component will be the same as the i component of b. Try drawing a point B on a graph and then another point just above it, can you see that their x-coordinares are the same?
Ohh, okay I get it now! Thanks

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