What Is the Direction of a Glass's Velocity as It Hits the Ground?

[waldvocm]

A glass is slid across a table, 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?

I found this to be vxi=3.65

b)What was the directionof the glass's velocity (degrees clockwise from the horizontal) as it hit the ground?

I used the equation t-1(0.860/1.53) =29.3 but the correct answer is 48.3

What did I do wrong?

 

[kuruman]

You need to find the x and y components of the velocity just before the glass hots the floor and calculate the angle from that.

 

[kerimek]

It seems like you may have made a mistake in your calculation. The correct equation to use would be t-1(0.860/1.53) = tanθ, where θ is the angle of the velocity vector with respect to the horizontal. Solving for θ, we get θ = 48.3 degrees. It is possible that you may have used the wrong value for the height of the table or the distance the glass traveled. Additionally, make sure you are using the correct units for your calculations. Double check your work and try again.