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Elastic and inelastic collisions

MBBphys

Gold Member
55
0
1. Homework Statement
In a closed system, in an inelastic collision, momentum and total energy is conserved, but total kinetic energy is not.
But how is this possible? If we have a change in total kinetic energy, we have a change in velocity, and so we must have a change in momentum as:
momentum=mass*velocity
So I am really confused!
Thanks :)

2. Homework Equations
n/a

3. The Attempt at a Solution
n/a
 

TSny

Homework Helper
Gold Member
12,046
2,619
Keep in mind that kinetic energy is a scalar quantity and momentum is a vector quantity.

Think about the example of two equal masses moving toward each other with equal speeds and the two masses stick together and come to rest after they collide.
 

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