Question

Which have direction of acceleration of gravity​

Answer 1

The direction of the acceleration due to gravity is downward (towards the center of Earth). In fact, its direction defines what we call vertical. Note that whether the acceleration a in the kinematic equations has the value +g or −g depends on how we define our coordinate system.

Answer 2

Answer:

The acceleration due to gravity is ALWAYS negative. Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of -9.81 m/s2, regardless of the direction. ... The acceleration is negative when going down because it is moving in the negative direction, down.