Yesterday, we discussed the concept of an impulse force, and concluded that three dimensional matter, including the human body, is made up of impulse forces.
From the time perspective of a human life, the impulse of a hammer hitting a nail is instantaneous. If we slow time, we can examine each stage of the interaction between hammer and nail. In slow motion, the hammer barely touches the nail, then puts increasingly more pressure on it. As the pressure increases, so does the heat. When the pressure is sufficient, the nail begins to move. Throughout the interaction, the momentum of the hammer is changing, based on the dynamic forces which make up the interaction.