Question

Consider a porter standing on a platform
with a suitcase which presses his head
with a force of 300 N. The reaction forces
is exerted by
(a) the head on the suitcase
(b) the earth on the suitcase
(c) the earth on the porter
(d) the suitcase on the earth​

Answer 1

Explanation:

According to Newton third law reaction force of 200N will be opposite to the direction of action and is upwards and caused by the porter from his head.