Answer:
Equal
Step-by-step explanation:
According to Newton's third law of motion, the strength of a reaction is equal and opposite to the strength of the action force. 
-  Newton's third law of motion states that "action and reaction forces are equal in magnitude but opposite in direction". 
 - Therefore, if an object exerts a force of magnitude KN on a body. 
 - The body will in return exert the same amount of force back on the object. 
 - The law gives us an idea that force is paired in their action.