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The acceleration of gravity is 9.81 m/s^2/ What was the cat's speed when it slid off the table? Anser in units of m/s.

Since you want to find the initial velocity I used the formula:

Vf^2=Vi^2+2ad I wasnt sure which distance to plug in there (1.4 or .42) I tried both distances and my answer was still wrong each time. You plug 9.81 as your 'a', your final velocity is 0 and you try to find your 'Vi'.

So my equation is like this: 0^2=Vi^2+2x9.81x1.4 (or .42??)

2. A cat chases a mouse across a 1.7 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 1.5m fro mthe edge of the table.

The acceleration of gravity is 9.81 m/s^2. What was the cat's speed when it slid off the table? Answer in units of m/s/

I tried to solve this one with the same equation I tried to solve the first one with, I also didnt know which distance to plug in and both my answers were wrong.