car A start 10 meters ahead of car B. Car A moves at v = (3.0i+0j) m/s and car B moves forward at v = (7.0i+0j) m/s how many seconds does it takes car B to catch up

Question

Physics

Mclaughlin

30 September, 20:27

car A start 10 meters ahead of car B. Car A moves at v = (3.0i+0j) m/s and car B moves forward at v = (7.0i+0j) m/s how many seconds does it takes car B to catch up

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Katelynn Snyder · Answer 1

Do both cars leave the starting line at the same time? That's kind of important. I'll assume that they both start out at the same time, and now I'll proceed to answer the question that I have invented.

- - Car B moves 4 m/s faster than Car A.

- - So Car-A's lead shrinks by 4 meters every second after they start.

- - It takes (10/4) = 2.5 seconds for Car-A's lead to shrink to zero.

- - So Car-B overtakes Car-A 2.5 seconds after they start.