Expliquer pourquoi le point M représente la position où le projectile est soumis à des actions qui se neutralisent. Faire
un schéma explicatif.
Déterminer la distance d entre la Terre et le point M, et
wérifier la dernière phrase du texte de Jules Verne.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •