Est-ce que quelqun pourrais m'aider avec cet exercice de physique, avec une explication si possible vu que je comprend rien. Merci beaucoup

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Which type of basaltic lava flow has a fairly smooth

Asailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5m/s2 for 4s. after the wind stops, the sailboat is traveling to the left with a velocity of 3.0m/s. assuming the acceleration from the wind is constant, what was the initial velocity of the sailboat before the gust of wind? answer using a coordinate system where rightward is positive.