Which of the following is not true for both gravitational and electric forces?
a. the inverse square distance law applies.
b. forces are proportional to physical properties.
c. potential energy is a function of distance of separation.
d. forces are either attractive or repulsive.

d.Forces are either attractive or repulsive.

Explanation:

Gravitational force is the attraction force between two point masses which is given by the formula

now similarly we know that electrostatic force is the force between two charges which is given as

now from above equation we can say that

1) Both type of forces will follow inverse square law

2) Both forces have potential energy which will inversely depends on the distance between two particles

3) Both forces depends on either the product of two charges or the product of two masses

So the only difference between two forces is that the gravitational force is only attraction type of force while electrostatic force is attraction and repulsion both type of force.

d.Forces are either attractive or repulsive.

Explanation:

Gravitational force is the attraction force between two point masses which is given by the formula

now similarly we know that electrostatic force is the force between two charges which is given as

now from above equation we can say that

1) Both type of forces will follow inverse square law

2) Both forces have potential energy which will inversely depends on the distance between two particles

3) Both forces depends on either the product of two charges or the product of two masses

So the only difference between two forces is that the gravitational force is only attraction type of force while electrostatic force is attraction and repulsion both type of force.

magnets not strong enough

explanation: