Question

We know that forces arise due to some mutual interaction between two entities and their interaction

effects can come into play through a “direct contact” or even without a “direct contact”. A special type

of a “direct contact” force has the general effect of slowing down moving objects. Nature has taken

special care to minimize the slowing down effect of this force on birds and fishes who have to move

through fluids a lot. Human have also used natural observations to design their special purpose “fast

moving objects” like the racing cars. Such objects are given special shapes.

(a) Identify contact and non-contact force from the following given forces (1x4=4)

(i) Gravitational force

(ii) Frictional force​

Answer 1

Answer:

(i) Gravitational force is a non contact force