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

Heather in her Corvette accelerates at the rate of <3.20, -2.00>m/s^2, while Jill in her Jaguar accelerates at <1.00, 3.20>m/s^2. They both start from rest at the origin of an xy coordinate system. After 5.50 s, (a) what is Heather's speed with respect to Jill, (b) how far apart are they, and (c) what is Heather's acceleration relative to Jill?

2. Relevant equations

3. The attempt at a solution

Vhj = Vh - Vj = 3.77 - 3.35 = .421

[(3.77cos(327.9))i + (3.77sin(327.9))j] - [(3.35cos(72.6))i + 3.35sin(72.6))j

= 2.19i - 5.20j

magnitude is 5.64

I really don't know if this is correct and how it fits in to the problem of getting the distance at 5.5 seconds and the speed at 5.50 seconds. Can someone help please?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Relative Velocity and Acceleration

**Physics Forums | Science Articles, Homework Help, Discussion**