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Rev. Notes > AS > Dynamics
 
 
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Newton's first law of motion Newton's second law of motion Newton's third law of motion
Linear momentum Example1 - Linear momentum Law of conservation of momentum
Elastic collisions Comparison between elastic and inelastic collisions Inelastic collision
Interaction between bodies
 

Elastic collisions

Perfectly elastic collisions:
An elastic collision is one in which momentum and kinetic energy are conserved during the collision. 

elastic collisions

Two identical objects A and B, moving at the same speed but in opposite direction, have a head on collision, just as shown in figure 1. This is a perfectly elastic collision. Each object bounces back with its velocity reversed. In this collision both momentum and kinetic energy are conserved.
The total kinetic energy of object A and object B before the collision can be found by using the formula mv2

Which is derived from

1/2mv2+1/2mv2 = mv2

 
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