Question

answer seriously and fast​

Answer 1

Answer:

(c) contact

(d) gravity,friction

answers of 13:-

a).   agent exerting force - fingers

      object on which force acts - lemon

      effect of force -  change in shape of lemon

b).   agent - fingers

      object - toothpaste tube

       effect - change in shape of tube

c).    agent - load

      object - spring

       effect - change in shape of spring

d).    agent - muscles of athlete

      object - athlete

       effect - change in motion of athlete

answers of 15:-

kicking a ball is a contact force and gravity is a non-contact force.