On a frictionless horizontal air table, puck A (with mass 0.366 kg) is moving toward puck B (with mass 0.254 kg ), which is initially at rest. After the collision, puck A has velocity 0.119 m/s to the left, and puck B has velocity 0.655 m/s to the right.(adsbygoogle = window.adsbygoogle || []).push({});

a) What was the speed of puck A (Vai) before the collision?

I got 0.336 m/s which is correct by using m1*v1 + m2*v2=m1*v -->elastic collision

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

for the energy part i am using the equation

1/2 m1 v1(squared)i = 1/2 m1 v(squared)1f + 1/2 m2 v(squared)2f

question is looking for change in kinetic energy DURING collision

i calculated Final KE - Initial KE but is that not considered the total change in KE DURING the collision? as i got 0.057 J.

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# Homework Help: Collision of pucks on frictionless table

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