Collision confusion

[sajib_mostofa]

Whats the difference between a question that asks you where the particles collide and one that asks you where they meet?

[Martoman]

Picture two tennis balls hitting each other. If they collide then they meet at the same point in time and space. They meet at the same point.... i think you mean where their paths cross, that is the tennis balls cross a certain place in space but at different times.

[sajib_mostofa]

Ahh yes I see what you mean

Could you show me how to do a q like that:

Find the coordinates of any points at which the paths of the particles will meet
and

[98.40_for_sure]

Redefine one of the equations in terms of something else

[Martoman]

equate their components and solve.





clearly i want to solve the second one first.

t = 6

check t = 6 on the first one.







Take the answer of t = 6.

The coordinates of the point is found by subbing in t = 6 into either equation. I prefer equation B



ie (37,12)

For the sake of checking sub into other one to get

So again, (37,12).

This tells you that they occupy the point (37,12) at time t = 6, that is, they meet at the point (37,12).

[superflya]

equate both i and j components then sub the time back in to get the coordinates.

[sajib_mostofa]

Thanks everyone