What were the velocity and direction of the glass as it fell?

[waldvocm]

A glass is slid across a table top, goes off the edge and falls to the floor. The table is 0.860m high and the glass lands 1.53m from the edge.
a)With what velocity did the glass leave the table top?
b)What was the direction of the glass's velocity(degrees clockwise from the horizontal)as it hit the ground?

For a) I believe that I have to find the x component of velocity.

xf=xi+vxit+.5axt^2 But I don't know the time either!

b) tan(0.860/1.53)= 29.3degrees

 

[tiny-tim]

Hi waldvocm!

(try using the X² tag just above the Reply box )

For a), call the time t, and do two equations, one for x and one for y. Then eliminate t.

What do you get? ​

 

[waldvocm]

I am not sure that I follow. Do you mean a quadratic equation?

 

[waldvocm]

How can I find the time if I don't know the velocity?

 

[tiny-tim]

Call the velocity v, call the time t, get two equations which both contain v and t.

That's two equations with two unknowns, so you should be able to find both of them.