Calculate the predicted impact point of a marble rolling off a desk w/ the height of .757m and traveling at an avg. velocity of .8231 m/s?

Answer 1

how long does it take to fall .757m? 1/2 gt^2 = .757
horizontally, distance = speed * time

that "avg velocity" junk is meaningless. What you need is the speed just as it rolls off the table, right?

Answer 2

Wouldn't it be vertical motion though?
t=1.34 seconds?

Answer 3

the avg velocity I think is horizontal speed on the table.
time to fall: 1/2 g t^2=757 or t= .395sec (check that).
how far did it travel horizontally? d=horizonal speed*time=.8231*.395= 32.5 cm