Physics
Give one example in each case where —
(a) the force is of contact, and
(b) force is at a distance.
Answer
(a) The force of contact — When a body slides over a rough surface, a force starts acting on the body in a direction opposite to the motion of the body, along the surface in contact. This is frictional force and is an example of contact force.
(b) The force at a distance or non contact force — In the universe, each particle attracts the other particle due to it's mass. This force of attraction between them is called gravitational force and it is an example of a non contact force.
Related Questions
Define a non-contact force.
Classify the following amongst contact and non-contact forces —
(a) frictional force, (b) normal reaction force, (c) force of tension in a string, (d) gravitational force, (e) electrostatic force, (f) magnetic force.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?
The separation between two masses is reduced to half. How is the magnitude of gravitational force between them affected?