# Work sheet for 7-4 through 7-6 Conservation of Energy of Collisions 7-4

```Work sheet for 7-4 through 7-6
Conservation of Energy of Collisions
7-4
1. What is an elastic Collision?
2. Write the equation for the conservation of energy during an elastic collision:
3. What is an inelastic collision?
Elastic collisions in one dimension
7-5
1. Why do we use a head on collision as an example for elastic collisions?
2. What is the equation for conservation of momentum?
3. What is the equation for Kinetic energy is an elastic collision equation?
4. Derive the relationship of velocity before and after a collision from the above
two equations:
5. Read Example 7-7 then try example 7-8 below
Inelastic Collisions 7-6
1. What happens to the kinetic energy that is not conserved in an inelastic
collision?
2. What is completely inelastic?
3. Atomic collisions are often elastic but macroscopic everyday collisions are
usually___________________________________________.
4. Read example 7-9 then do example 7-10 below:
On the back of this sheet do the following problems from pg, 193: #25, 31, 33, 37
and 39
```