- #1
Valenti
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Homework Statement
A child stands on frictionless ice and throws a snowball. Estimate the recoil velocity of the child.
Homework Equations
m1v1i + m2v2i =m1v1 +m2v2f
1/2mv21i + 1/2 mv22i = 1/2 mv21f + 1/2mv22f
The Attempt at a Solution
After choosing estimates for weight of snowball, speed of child throwing snowball and weight of child I plugged it into the momentum and kinetic energy laws and solved for the final velocity in both of them, but I am not sure which equation is supposed to be used and in what situations