The discussion focuses on a two-dimensional collision problem involving two hockey pucks that collide at a 90-degree angle and stick together. The masses of the pucks are 0.71 kg and 0.52 kg, with initial velocities of 1.6 m/s and 3.8 m/s, respectively. The correct approach to solving the problem involves using momentum conservation principles, leading to a final speed of 2.52 m/s for the combined pucks after the collision. The discussion highlights the importance of treating the velocities as vector quantities rather than scalar speeds.
PREREQUISITESPhysics students, educators, and anyone interested in understanding collision dynamics and momentum conservation in two-dimensional systems.
My solution was wrong, Id like to know how to get the right answerkuruman said:Hi Jeemeli and welcome to PF.
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You've gone from a correct formula involving vector velocities and applied it to scalar speeds.Jeemeli said:m1v1+m2v2=v(m1+m2)
=0.71kg*1.6m/s+0.52kg*3.8m/s=(0.71kg+0.52kg)*v
In short, this is a two-dimensional collision.Jeemeli said:My solution was wrong, Id like to know how to get the right answer