## Physics: Principles with Applications (7th Edition)

The maximum amount of work is the work done by gravity, assuming the nail is driven a very short distance. The force and the displacement are both straight downward. The angle between them is 0 degrees. Use equation 6–1. $$W=(1.2 kg)(9.80 \frac{m}{s^2})(0.50 m)(cos 0^{\circ}) \approx 5.9 J$$