Object A has of mass 7.20 kilograms, and object B has a mass of 5.75 kilograms. The two objects move along a straight line toward each other with velocities +2.00 meters/second and -1.30 meters/second respectively. What is the total kinetic energy of the objects after the collision, if the collision is perfectly elastic?

Question

anonymous · Answer

In a perfectly elastic collision, kinetic energy is conserved. This means the total kinetic energy before the collision must equal the total kinetic energy after the collision. You need to work out the kinetic energy before the collision using 1/2mv^2, this should also be the Kinetic energy afterwards. I'm getting 19.28J. You try

anonymous · Answer

I got 19.33?

anonymous · Answer

Okay, one of the answers is 19.3 joules Thank you:)

anonymous · Answer

No problem