The value of $g$ remains the same at all places on the surface of the earth. Is this statement true?

Calculate the force of gravitation between two objects of masses $50 \, kg$ and $120 \, kg$ respectively,kept at a distance of $10 \, m$ from each other. $(G = 6.673 \times 10^{-11} \, N \, m^2 \, kg^{-2})$

Three students $A, B$ and $C$ were performing an experiment to establish the relation between the weight of a wooden block and the minimum force required to just move it on a horizontal surface. The experimental setup used by each is as shown in the figures given below.
The result obtained by them will be:

Choose the correct alternative:
$(a)$ Acceleration due to gravity increases/decreases with increasing altitude.
$(b)$ Acceleration due to gravity increases/decreases with increasing depth.
$(c)$ Acceleration due to gravity is independent of the mass of the earth/mass of the body.

According to Newton's law of gravitation,every particle of matter attracts every other particle. But bodies on the surface of the Earth never move towards each other on account of this force of attraction. Why?

What is the shape of the path followed by a projectile?