1. The problem statement, all variables and given/known data When an 98.0-g piece of toast is inserted into a toaster, the toaster's ejection spring is compressed 7.20 cm. When the toaster ejects the toasted slice, the slice reaches a height of 3.4 cm above it's starting position. What is the average force that the ejection spring exerts on the toast? What is the time over which the ejection spring pushes on the toast. Assume that throughout the ejection process the toast experiences a constant acceleration. 2. Relevant equations Fs=-k/\x weight=mg PE=mgh 3. The attempt at a solution I'm not entirely sure how to get the spring constant I've tried equating PE=Fs... mt=98.0g Sc=.0720m Ht=.034m Thus, mgh = -k/\x (98.0)(.034)= -k(.034-.0720) k=89.76 but this seemed rather large, so then I assumed the mass should be in kg: k=.0877 which made a little more sense. Do I now just plug those values in Fs=-kx ? Fs=-(.0877)(.034-.0720)= .00333 ?