A small hockey puck slides without friction over the icy hill shown in the figure and lands 6.20 m from the foot of the cliff with no air resistance. What was its speed v0 at the bottom of the hill? 
Definitions:
p-value
A statistical measure that indicates the probability of the observed data, under the null hypothesis, being at least as extreme as it is; used in hypothesis testing.
Profile Plot
A graphical representation that shows the interaction effects between factors, often used in multivariate data analysis to display the mean values of different measurements across categories.
Interactions
In an experiment or statistical model, the way in which the effect of one explanatory variable on a response variable changes depending on the level of another explanatory variable.
Two-Way Analysis
A statistical method used to examine the effects of two independent variables on a dependent variable, often to understand interactions between the two variables.
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