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Questions and Answers

During a collision, momentum is conserved if the system is?

dynamic

closed

isolated (correct)

open

What happens to the objects in a completely inelastic collision?

They break apart

They stick together (correct)

They change shape

They bounce off each other

What is conserved in a completely elastic collision?

Only kinetic energy

Neither momentum nor kinetic energy

Only momentum

Both momentum and kinetic energy (correct)

What do you need to derive the second equation for completely elastic collisions?

Both the conservation of momentum and kinetic energy Signup and view all the answers

What is the result of rearranging the conservation of kinetic energy in a completely elastic collision?

ma(vai – vaf) (vai + vaf) = mb (vbf - vbi) (vbf + vbi) Signup and view all the answers

What do you need to do to solve collision problems?

All of the above Signup and view all the answers

What is the final equation derived for completely elastic collisions?

vai + vaf = vbi + vbf Signup and view all the answers

What is the key to determining which type of collision is occurring?

The type of forces involved Signup and view all the answers