Question

Which of the following forces doesn’t change with distance?
$(A)$ Electrostatic Force
$(B)$ Gravitational Force
$(C)$ Frictional Force
$(D)$ Magnetic Force

Answer 1

A force is a push or a pull that alters or tends to alter an object's state of rest or uniform motion, as well as its direction or shape. Objects accelerate as a result of it. Any influence that causes an object to change is referred to as a force. The term "distance" refers to how far an object moves in a certain amount of time. The power of attraction or repulsion between items reduces as the separation distance between them increases.

Complete step-by-step solution:
Gravitational, magnetic, and electrostatic forces follow the inverse square law, i.e., the forces are inversely proportional to the square of the distance. But frictional force does not depend on distance.
The gravitational force between $2$ bodies decreases with the distance between the two bodies-
${F_g} = G\dfrac{{Mm}}{{{r^2}}}$
The magnetic force between $2$ bodies decreases with the distance between the two bodies-
${F_B} = qvBsin\theta$
The electrostatic force between $2$ bodies decreases with the distance between the two bodies-
${F_e} = {k_e}\dfrac{{{q_1}{q_2}}}{{{r^2}}}$
The Frictional force between $2$ bodies -
${F_f} = \mu N$
Since in the formula of the frictional force there distance does not exist, we can say the distance does not affect this force.
Hence option (c) is correct.

Note: The electrostatic force between particles is an attracting and repulsive force induced by their electric charges. The electrostatic force is the electric force between two charged things that are stationary. Coulomb’s force is another name for it.
In mechanics, gravity is the universal force of attraction acting between all matters, also known as gravitation. It is the weakest known force in nature; therefore it has no bearing on the intrinsic properties of common matter.
Frictional Force is the force created when two surfaces collide and slide against one another. The surface texture and the amount of effort required to bring them together have a big impact on these forces. The volume of frictional force is affected by the object's angle and position.