(adsbygoogle = window.adsbygoogle || []).push({}); Problem in equations of kinematics in two dimensions..plz help

Hi, I'm a first year physics student and am studying equations of kinematics in two dimensions and projectile motion. I was given the following question as homework to prep for my first exam this Wednesday. I'm pretty solid on the subject but for some reason I am stuck on this problem:

1. The problem statement, all variables and given/known data

"A car drives straight off the edge of a cliff that is 54m high. The point of impact is 130m from the base of the cliff. How fast was the car traveling when it went off the cliff?"

2. Relevant equations

Vx = Vox + AxT

X = 1/2(Vox + Vx)T

X = VoxT + 1/2AxT^2

Vx^2 = Vox^2 + 2AxX

Vy = Voy + AyT

Y = 1/2(V0y + Vy)T

Y = VoyT + 1/2AyT^2

Vy^2 = Voy^2 + 2AyY

3. The attempt at a solution

Based on the information given, I know my Delta X and Delta Y. However, no matter which equation I use to sovle for Vox (the speed of the car when it left the cliff) I always have 2 unknown values in my equation. If I knew Vx or T I could solve this. However, I know that it is solvable, my professor posted T and VoX. I am just totally stuck on where to take the first step in the problem.

Any help is greatly appreciated.

Bat.

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# Homework Help: Problem in equations of kinematics in two dimensions

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