A truck starts from rest and accelerates uniformly at 2.0 m/s². At t = 10 s, a stone is dropped by a

Question

A truck starts from rest and accelerates uniformly at 2.0 m/s². At t = 10 s, a stone is dropped by a person standing on the top of the truck. What is the magnitude and direction of acceleration of the stone at t = 11 s? (Neglect air resistance, g = 10 m/s²)

Professor PC Thomas Classes · Answer

Once the stone is dropped, it is no longer in contact with the truck, so the horizontal acceleration becomes zero. The only force acting on it is gravity, producing a downward acceleration of g = 10 m/s².