- #1

1irishman

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## Homework Statement

An object is thrown horizontally from the top of a cliff at a velocity of 20m/s.

If the object takes 4.20s to reach the ground, what is the range of the object?

I got the first question figured out, but i can't figure out the second question which is:

What is the velocity of the object when it hits the ground? This is the one I can't seem to figure out.

## Homework Equations

v=d/t horizontal uniform motion equation

d= vit +1/2at^2 vertical uniformly accelerated motion equation

## The Attempt at a Solution

I got the range to be 84m in terms of the time and velocity given for the answer to the first question that applies to the horizontal distance.

The final velocity when the object hits the ground will be zero I figure. The initial velocity on the vertical will be zero too right? Help?