One object exerts a force of magnitude F1 on another object and experiences a force of magnitude F2 in return. What is true for F1 and F2?

The two forces, F₁ and F₂ have equal magnitude but act in opposite direction.

According to Newton's third law of motion, action and reaction are always equal and opposite.

When an object exerts a force of magnitude F₁, the same object will experience an equal force (same magnitude) but in opposite direction, say F₂.

From the given question;

F₁ is the force exerted by the objectF₂ is the force experienced by the object

The only true relationship between F₁ and F₂ is explained as follows;

F₁ and F₂ have equal magnitude F₁ and F₂ act in opposite direction

F₁ = -F₂

Thus, we can conclude that F₁ and F₂ have equal magnitude but act in opposite direction.

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The relation between F1 and F2 is : F1 = - F2. That is the forces are equal in magnitude but opposite in direction.

Explanation:

According to Newton's 3rd law of motion statement, it states that for all actions there is equal but opposite reaction. This law is also known as the law of symmetry. It means that forces  occur in pairs in any conditions. An object will not apply force on other object without experiencing the force on itself.This means when an object exerts force F1 on another object, it also exerts the same force of same magnitude on itself in opposite direction to the force it exerted on another object.

Ithink the answer is fusion 

F  you double the  force, you double the acceleration, but  if  you double the  mass, you velocity. all bodies accelerate at the  same  rate regardless of size or  mass.