(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Given the following conditions, what is the relative velocity of 2 cars if their ground speeds are 80km/h for Car A and 45 km/h for Car B?

a) both cars are heading in the same direction, A behind B in the reference frame of A

b) Use the reference frame of B for part A)

c) both cars are heading towards each other. take the reference frame of A

d) use B's reference frame for part c.

2. Relevant equations

none. i just used simple addition + subtraction.

3. The attempt at a solution

basically the wording of this problem is really throwing me off. i dont understand what they're trying to ask me to do evne though it seems like an easy question.

im guessing that 35km/h will be the answer for A and B? because i figured if you were sitting in car B, it seems like car A is just going 35 km/h faster..?

please help. thanks

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# Relative velocity of two speeding cars

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