Which one of the following is not a contact force ?
[amp_mcq option1=”Push force” option2=”Gravitational force” option3=”Frictional force” option4=”Strain force” correct=”option2″]
This question was previously asked in
UPSC NDA-2 – 2016
Gravitational force is a non-contact force (also known as a field force). It acts between any two objects possessing mass, even when they are separated by a distance, without any physical contact between them (e.g., the force between the Earth and the Sun, or the force between the Earth and an object in free fall). Push force, frictional force, and strain force (which arises from interactions between atoms/molecules within a material under deformation) are all examples of contact forces.