On a frictionless horizontal air table, puck A (with mass 0.253 kg) is moving toward puck B (with mass 0.373 kg), which is initially at rest. After the collision, puck A has velocity 0.124 m/s to the left, and puck B has velocity 0.650 m/s to the right.(adsbygoogle = window.adsbygoogle || []).push({});

Calculate DeltaK, the change in the total kinetic energy of the system that occurs during the collision.

- I got ΔK = .007 but was not right

-puck A with speed 0.834 is 0.5*0.253*(0.834)2 . Total energy of the two pucks afterwards are 0.5*0.253*(0.124)2 +0.5*0.373*(0.650)2

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Looking for deltaK, change in total kinetic energy

**Physics Forums | Science Articles, Homework Help, Discussion**