Which one of the following forces is a contact force?
$(a)$. Force of gravity
$(b)$. Force of friction
$(c)$. Magnetic force
$(d)$. Electrostatic force

AcademicPhysicsNCERTClass 8

A frictional force can be acted only when the surfaces of two objects are in contact. So, the Force of friction is a contact force.

Therefore, option $(b)$ is correct.

Updated on 10-Oct-2022 13:29:00