The document discusses drawing a before-and-after visual overview to solve simple collision problems using Newton's second law. It explains that a visual overview involves compiling lists of known quantities like initial and final velocities and mass, and unknown variables like impulse that allow calculation of changes. The tactic focuses on connecting the 'before' and 'after' states to predict collision outcomes without complex force analyses.

1. Part C onstants To complete your visual overview of the problem, you should compile two lists:
one of known quantities and one listing the unknown variables that will allow you to answer the
question in the problem. Below are all of the relevant quantities in this problem: the initial and
final velocities of the puck (v) and(the magnitudeJ of the impulse delivered by the stick, and the
mass m of the puck. Sort them accordingly Learning Goal To practice Tactics Box 9.1 Drawing a
before-and- after visual overview During a collision, two objects exert forces on each other that
vary in a complex way during the time of the collision. Using Newton's second law to predict
the outcome of a collision would thus be a daunting challenge. Nevertheless, some collisions
have very simple outcomes that can be predicted by analyzing the motion of the objects before
and after the collision. A before-and-after visual overview is therefore an important problem-
solving tool in suclh problems. The following Tactics Box explains how to draw a visual
overview focusing on the connection between "before" and "after. Drag the appropriate
quantities to their respective bins Reset Help Known Unknown
Solution
Known quantities : Initial velocity(v xi ) and final velocity(v xf ) of the puck and mass of the puck
(m)
Because these quantities can be measured directly
Unkown quantities : J x = Impulse delivered by the stick. As Impulse = force * time .It can only
be calculated seeing the change in momentum.