Which of these things were elements of trenches? Check all that apply. Barbed wire protected dugouts parapets no-man’s-land.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.

To wear the full equipment.