Question

the contact force is given by ​

Answer 1

Answer:

When two objects are in contact the contact force is given

Answer 2

Answer:

contact force is applied when two objects are kept in contact with each other

Explanation:

for example -- a book on table

when you push a book kept on a table it moves in the direction in which force is applied. the book moves and then stops after a some time because of the contact force the book shares with the table

... I hope it helps...