Physics 9702 · AS & A Level · Energy conservation

Energy conservation — practice question

A hammer that has $10\,\text{J}$ of kinetic energy strikes a nail and drives it $5.0\,\text{mm}$ into a plank. After the collision, both the hammer and the nail are brought to rest. What is the average force acting on the nail as it moves through the $5.0\,\text{mm}$?

  • A$0.050\,\text{N}$
  • B$2.0\,\text{N}$
  • C$50\,\text{N}$
  • D$2000\,\text{N}$

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