An object is thrown vertically upward. At the top of its flight, when its velocity is momentarily zero, its acceleration is zero

Answer 1

At the top of its flight, the object's velocity is indeed momentarily zero, but its acceleration is not zero. When an object is thrown vertically upward, it is affected by gravity, which pulls it downward. The acceleration due to gravity is approximately \(9.81 , \text{m/s}^2\) downward, regardless of the object's position in its flight path.

Thus, while the velocity of the object is zero at the highest point, the acceleration remains constant at \(9.81 , \text{m/s}^2\) downward. The force of gravity is still acting on the object, which is why the object will begin to descend after reaching its peak height.