Final answer:
The value of ⃗g in vector form is 9.8 m/s² (option d). The Earth's acceleration due to gravity is approximately 9.8 m/s² and acts in the downward direction.
Step-by-step explanation:
The value of g in vector form can be given as ⃗g = 9.8 m/s² (option d).
G represents the acceleration due to gravity and its magnitude is approximately 9.8 m/s² on Earth. It acts in the downward direction (towards the center of the Earth).
It's important to note that the positive or negative sign of the acceleration depends on the choice of the coordinate system. If the upward direction is considered positive, then the acceleration will be -9.8 m/s².