- #1

- 48

- 0

## Homework Statement

The start point of a ballistic launcer is h1 = 18 cm above its launch point (including the correction for the starting angle) and the launch point is h2 = 35 cm above the bench top. A steel ball rolled down the launcher has a mass of 10.2 g. Answer the following question:

Calculate the impact distance when UNC = 0.00216 J. Express your answer in cm

## Homework Equations

l^2 = ((20/7)(h1-(UNC/mg))h2

l = impact distance

g= gravity 9.81

m= 10.2 g

h1 = 18 cm

h2 = 35 cm

UNC = given

## The Attempt at a Solution

I plugged in the numbers and solved for l (impact distance) and got ) 42.43 cm, but for some reason the computer program I am plugging it into says its wrong. Can you help me out please? Thanks!