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## Scenario 11: Hammering A Nail

###### System: Hammer, nail, wooden plank on Earth

###### Initial State: A hammer was held vertically above a nail. It was about to fall to hit a nail into a wooden plank.

###### Final State: The nail was embedded in the wooden plank. The hammer was stationary.

###### Remarks: A sound was produced when the hammer hits the nail. There was a slight increase in temperature in the hammer, nail and wooden plank. There was negligible transfer of energy to the surroundings by heating.

Hint 1
Consider the principle of conservation of energy.
Hint 2
Consider the type of energy transfer when the sound was produced.

##### Initial Amount of Energy of the System

##### System

##### Final Amount of Energy of the System

Energy / Units

C
E
G
I
K
N

Energy Transfer In:
Type Of Transfer
Propagation of waves Propagation of waves
Heating Heating
Electrically Electrically
Mechanically Mechanically
------------ ------------
Type Of Transfer
Propagation of waves Propagation of waves
Heating Heating
Electrically Electrically
Mechanically Mechanically
------------ ------------
Energy Transfer Out:
Type Of Transfer
Propagation of waves Propagation of waves
Heating Heating
Electrically Electrically
Mechanically Mechanically
------------ ------------
Type Of Transfer
Propagation of waves Propagation of waves
Heating Heating
Electrically Electrically
Mechanically Mechanically
------------ ------------

Energy / Units

C
E
G
I
K
N

##### Initial Energy of the System

+

##### Energy Transferred Into the System

=

##### Energy Transferred Out of the System

+

##### Final Energy of the System

Legend:

Electrically

Heating

C - Chemical
E - Elastic
G - Gravitational
I - Internal
K - Kinetic
N - Nuclear

Mechanically

Propagation of waves