Hint: Is the object accelerating? (If yes,) what is the nature of its acceleration?

Hint: a - Use Torricelli's equation to find the acceleration and, after that, find the force with Newton's Seconfd Law of Motion. b - Employ the 

Hint: Find the acceleration employing its formula. Then, calculate the force with Newton's Second Law of Motion.

Hint: First calculate the acceleration using Torricelli's equation. Then, find the force applying Newton's Second Law of Motion.

Hint: a - Find the acceleration using Newton's Second Law of Motion, then, use the equation of the motion (velocity as a function of time) to calculate the velocity. b - Use Torricelli’s equation to calculate the displacement.